15621808095968 has 72 divisors (see below), whose sum is σ = 32346097678440. Its totient is φ = 7417928716800.

The previous prime is 15621808095967. The next prime is 15621808095991. The reversal of 15621808095968 is 86959080812651.

It is a junction number, because it is equal to n+sod(n) for n = 15621808095898 and 15621808095907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15621808095961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1191083 + ... + 5715093.

It is an arithmetic number, because the mean of its divisors is an integer number (449251356645).

Almost surely, 2^{15621808095968} 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 15621808095968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16173048839220).

15621808095968 is an abundant number, since it is smaller than the sum of its proper divisors (16724289582472).

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

15621808095968 is an equidigital number, since it uses as much as digits as its factorization.

15621808095968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4524172 (or 4524103 counting only the distinct ones).

The product of its (nonzero) digits is 74649600, while the sum is 68.

The spelling of 15621808095968 in words is "fifteen trillion, six hundred twenty-one billion, eight hundred eight million, ninety-five thousand, nine hundred sixty-eight".