156849773652978 has 32 divisors (see below), whose sum is σ = 370078728622080. Its totient is φ = 43368601009680.

The previous prime is 156849773652959. The next prime is 156849773653007. The reversal of 156849773652978 is 879256377948651.

It is a junction number, because it is equal to n+sod(n) for n = 156849773652894 and 156849773652903.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60234166768 + ... + 60234169371.

It is an arithmetic number, because the mean of its divisors is an integer number (11564960269440).

Almost surely, 2^{156849773652978} is an apocalyptic number.

156849773652978 is an abundant number, since it is smaller than the sum of its proper divisors (213228954969102).

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

156849773652978 is a wasteful number, since it uses less digits than its factorization.

156849773652978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120468336182.

The product of its digits is 38407219200, while the sum is 87.

The spelling of 156849773652978 in words is "one hundred fifty-six trillion, eight hundred forty-nine billion, seven hundred seventy-three million, six hundred fifty-two thousand, nine hundred seventy-eight".