156911873887439 has 4 divisors (see below), whose sum is σ = 171176589695400. Its totient is φ = 142647158079480.

The previous prime is 156911873887399. The next prime is 156911873887469. The reversal of 156911873887439 is 934788378119651.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 156911873887439 - 2¹² = 156911873883343 is a prime.

It is a super-2 number, since 2×156911873887439² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156911873887469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7132357903964 + ... + 7132357903985.

It is an arithmetic number, because the mean of its divisors is an integer number (42794147423850).

Almost surely, 2^{156911873887439} is an apocalyptic number.

156911873887439 is a deficient number, since it is larger than the sum of its proper divisors (14264715807961).

156911873887439 is a wasteful number, since it uses less digits than its factorization.

156911873887439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14264715807960.

The product of its digits is 2194698240, while the sum is 80.

The spelling of 156911873887439 in words is "one hundred fifty-six trillion, nine hundred eleven billion, eight hundred seventy-three million, eight hundred eighty-seven thousand, four hundred thirty-nine".