15825971278068 has 192 divisors, whose sum is σ = 43339630000128. Its totient is φ = 4400664629760.

The previous prime is 15825971278067. The next prime is 15825971278069. The reversal of 15825971278068 is 86087217952851.

15825971278068 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (15825971278067) and next prime (15825971278069).

It is a super-2 number, since 2×15825971278068² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15825971277993 and 15825971278011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15825971278067) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1333605871 + ... + 1333617737.

It is an arithmetic number, because the mean of its divisors is an integer number (225727239584).

Almost surely, 2^{15825971278068} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15825971278068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21669815000064).

15825971278068 is an abundant number, since it is smaller than the sum of its proper divisors (27513658722060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15825971278068 is a wasteful number, since it uses less digits than its factorization.

15825971278068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13222 (or 13220 counting only the distinct ones).

The product of its (nonzero) digits is 135475200, while the sum is 69.

The spelling of 15825971278068 in words is "fifteen trillion, eight hundred twenty-five billion, nine hundred seventy-one million, two hundred seventy-eight thousand, sixty-eight".