156820466774 has 16 divisors (see below), whose sum is σ = 235526136912. Its totient is φ = 78311818368.

The previous prime is 156820466711. The next prime is 156820466779. The reversal of 156820466774 is 477664028651.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156820466779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5468357 + ... + 5496959.

It is an arithmetic number, because the mean of its divisors is an integer number (14720383557).

Almost surely, 2^156820466774 is an apocalyptic number.

156820466774 is a deficient number, since it is larger than the sum of its proper divisors (78705670138).

156820466774 is a wasteful number, since it uses less digits than its factorization.

156820466774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31951.

The product of its (nonzero) digits is 13547520, while the sum is 56.

The spelling of 156820466774 in words is "one hundred fifty-six billion, eight hundred twenty million, four hundred sixty-six thousand, seven hundred seventy-four".