157896121220 has 24 divisors (see below), whose sum is σ = 331629537624. Its totient is φ = 63149366016.

The previous prime is 157896121189. The next prime is 157896121259. The reversal of 157896121220 is 22121698751.

It can be written as a sum of positive squares in 4 ways, for example, as 34094883904 + 123801237316 = 184648^2 + 351854^2 .

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, 424217 + ... + 704096.

It is an arithmetic number, because the mean of its divisors is an integer number (13817897401).

Almost surely, 2^157896121220 is an apocalyptic number.

157896121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157896121220 is an abundant number, since it is smaller than the sum of its proper divisors (173733416404).

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

157896121220 is a wasteful number, since it uses less digits than its factorization.

157896121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135319 (or 1135317 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 44.

The spelling of 157896121220 in words is "one hundred fifty-seven billion, eight hundred ninety-six million, one hundred twenty-one thousand, two hundred twenty".