156820491454908 has 12 divisors (see below), whose sum is σ = 365914480061480. Its totient is φ = 52273497151632.

The previous prime is 156820491454883. The next prime is 156820491454937. The reversal of 156820491454908 is 809454194028651.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6534187143943 + ... + 6534187143966.

Almost surely, 2^{156820491454908} is an apocalyptic number.

It is an amenable number.

156820491454908 is an abundant number, since it is smaller than the sum of its proper divisors (209093988606572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

156820491454908 is a wasteful number, since it uses less digits than its factorization.

156820491454908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13068374287916 (or 13068374287914 counting only the distinct ones).

The product of its (nonzero) digits is 99532800, while the sum is 66.

The spelling of 156820491454908 in words is "one hundred fifty-six trillion, eight hundred twenty billion, four hundred ninety-one million, four hundred fifty-four thousand, nine hundred eight".