15954156568 has 64 divisors (see below), whose sum is σ = 34926336000. Its totient is φ = 6829431840.

The previous prime is 15954156553. The next prime is 15954156587. The reversal of 15954156568 is 86565145951.

15954156568 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×15954156568² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2716371 + ... + 2722237.

It is an arithmetic number, because the mean of its divisors is an integer number (545724000).

Almost surely, 2^15954156568 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 15954156568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17463168000).

15954156568 is an abundant number, since it is smaller than the sum of its proper divisors (18972179432).

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

15954156568 is an equidigital number, since it uses as much as digits as its factorization.

15954156568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6885 (or 6867 counting only the distinct ones).

The product of its digits is 6480000, while the sum is 55.

The spelling of 15954156568 in words is "fifteen billion, nine hundred fifty-four million, one hundred fifty-six thousand, five hundred sixty-eight".