2157620984157 has 32 divisors (see below), whose sum is σ = 3091783578624. Its totient is φ = 1333480262400.

The previous prime is 2157620984137. The next prime is 2157620984209. The reversal of 2157620984157 is 7514890267512.

It is not a de Polignac number, because 2157620984157 - 2⁸ = 2157620983901 is a prime.

It is a super-3 number, since 3×2157620984157³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 2157620984097 and 2157620984106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157620984107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57014232 + ... + 57052062.

It is an arithmetic number, because the mean of its divisors is an integer number (96618236832).

Almost surely, 2^{2157620984157} is an apocalyptic number.

It is an amenable number.

2157620984157 is a deficient number, since it is larger than the sum of its proper divisors (934162594467).

2157620984157 is a wasteful number, since it uses less digits than its factorization.

2157620984157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54609.

The product of its (nonzero) digits is 8467200, while the sum is 57.

The spelling of 2157620984157 in words is "two trillion, one hundred fifty-seven billion, six hundred twenty million, nine hundred eighty-four thousand, one hundred fifty-seven".