2157715172567 has 16 divisors (see below), whose sum is σ = 2197424700000. Its totient is φ = 2118360059904.

The previous prime is 2157715172551. The next prime is 2157715172603. The reversal of 2157715172567 is 7652715177512.

It is a cyclic number.

It is not a de Polignac number, because 2157715172567 - 2⁴ = 2157715172551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157715172267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37141559 + ... + 37199607.

It is an arithmetic number, because the mean of its divisors is an integer number (137339043750).

Almost surely, 2^{2157715172567} is an apocalyptic number.

2157715172567 is a deficient number, since it is larger than the sum of its proper divisors (39709527433).

2157715172567 is a wasteful number, since it uses less digits than its factorization.

2157715172567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61090.

The product of its digits is 7203000, while the sum is 56.

The spelling of 2157715172567 in words is "two trillion, one hundred fifty-seven billion, seven hundred fifteen million, one hundred seventy-two thousand, five hundred sixty-seven".