15878662336641 has 48 divisors (see below), whose sum is σ = 23465619201024. Its totient is φ = 9493766374656.

The previous prime is 15878662336637. The next prime is 15878662336651. The reversal of 15878662336641 is 14663326687851.

It is a happy number.

It is not a de Polignac number, because 15878662336641 - 2² = 15878662336637 is a prime.

It is a super-2 number, since 2×15878662336641² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15878662336651) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11130016 + ... + 12475358.

It is an arithmetic number, because the mean of its divisors is an integer number (488867066688).

Almost surely, 2^{15878662336641} is an apocalyptic number.

It is an amenable number.

15878662336641 is a deficient number, since it is larger than the sum of its proper divisors (7586956864383).

15878662336641 is a wasteful number, since it uses less digits than its factorization.

15878662336641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345590 (or 1345543 counting only the distinct ones).

The product of its digits is 209018880, while the sum is 66.

The spelling of 15878662336641 in words is "fifteen trillion, eight hundred seventy-eight billion, six hundred sixty-two million, three hundred thirty-six thousand, six hundred forty-one".