156806218865867 has 16 divisors (see below), whose sum is σ = 160792517394432. Its totient is φ = 152847301838880.

The previous prime is 156806218865833. The next prime is 156806218865893. The reversal of 156806218865867 is 768568812608651.

It is a cyclic number.

It is not a de Polignac number, because 156806218865867 - 2²² = 156806214671563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156806218835867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46798742 + ... + 50037332.

It is an arithmetic number, because the mean of its divisors is an integer number (10049532337152).

Almost surely, 2^{156806218865867} is an apocalyptic number.

156806218865867 is a deficient number, since it is larger than the sum of its proper divisors (3986298528565).

156806218865867 is a wasteful number, since it uses less digits than its factorization.

156806218865867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3242818.

The product of its (nonzero) digits is 1857945600, while the sum is 77.

The spelling of 156806218865867 in words is "one hundred fifty-six trillion, eight hundred six billion, two hundred eighteen million, eight hundred sixty-five thousand, eight hundred sixty-seven".