156245805220 has 24 divisors (see below), whose sum is σ = 328942696824. Its totient is φ = 62340892416.

The previous prime is 156245805203. The next prime is 156245805239. The reversal of 156245805220 is 22508542651.

It can be written as a sum of positive squares in 4 ways, for example, as 46944155556 + 109301649664 = 216666^2 + 330608^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9831217 + ... + 9847096.

It is an arithmetic number, because the mean of its divisors is an integer number (13705945701).

Almost surely, 2^156245805220 is an apocalyptic number.

156245805220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156245805220 is an abundant number, since it is smaller than the sum of its proper divisors (172696891604).

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

156245805220 is a wasteful number, since it uses less digits than its factorization.

156245805220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19678719 (or 19678717 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 40.

The spelling of 156245805220 in words is "one hundred fifty-six billion, two hundred forty-five million, eight hundred five thousand, two hundred twenty".