156121621607 has 24 divisors (see below), whose sum is σ = 191822122800. Its totient is φ = 126342550656.

The previous prime is 156121621573. The next prime is 156121621613. The reversal of 156121621607 is 706126121651.

It is not a de Polignac number, because 156121621607 - 2⁶ = 156121621543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156121620607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13382 + ... + 558947.

It is an arithmetic number, because the mean of its divisors is an integer number (7992588450).

Almost surely, 2^156121621607 is an apocalyptic number.

156121621607 is a deficient number, since it is larger than the sum of its proper divisors (35700501193).

156121621607 is a wasteful number, since it uses less digits than its factorization.

156121621607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572655 (or 572648 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 156121621607 in words is "one hundred fifty-six billion, one hundred twenty-one million, six hundred twenty-one thousand, six hundred seven".