2157713658081 has 12 divisors (see below), whose sum is σ = 3117461642880. Its totient is φ = 1438123093560.

The previous prime is 2157713658073. The next prime is 2157713658097. The reversal of 2157713658081 is 1808563177512.

2157713658081 is a `hidden beast` number, since 2 + 1 + 57 + 7 + 1 + 3 + 6 + 580 + 8 + 1 = 666.

It is not a de Polignac number, because 2157713658081 - 2³ = 2157713658073 is a prime.

It is a super-2 number, since 2×2157713658081² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2157713658011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29351125 + ... + 29424546.

It is an arithmetic number, because the mean of its divisors is an integer number (259788470240).

Almost surely, 2^{2157713658081} is an apocalyptic number.

It is an amenable number.

2157713658081 is a deficient number, since it is larger than the sum of its proper divisors (959747984799).

2157713658081 is a wasteful number, since it uses less digits than its factorization.

2157713658081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58779756 (or 58779753 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 54.

The spelling of 2157713658081 in words is "two trillion, one hundred fifty-seven billion, seven hundred thirteen million, six hundred fifty-eight thousand, eighty-one".