157072121664420 has 48 divisors (see below), whose sum is σ = 441886310083008. Its totient is φ = 41687387736960.

The previous prime is 157072121664389. The next prime is 157072121664461. The reversal of 157072121664420 is 24466121270751.

It is a super-2 number, since 2×157072121664420² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 157072121664420.

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, 6203467659 + ... + 6203492978.

It is an arithmetic number, because the mean of its divisors is an integer number (9205964793396).

Almost surely, 2^{157072121664420} is an apocalyptic number.

157072121664420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157072121664420 is an abundant number, since it is smaller than the sum of its proper divisors (284814188418588).

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

157072121664420 is a wasteful number, since it uses less digits than its factorization.

157072121664420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12406960860 (or 12406960858 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 48.

The spelling of 157072121664420 in words is "one hundred fifty-seven trillion, seventy-two billion, one hundred twenty-one million, six hundred sixty-four thousand, four hundred twenty".