2157539164774 has 24 divisors (see below), whose sum is σ = 3764800673568. Its totient is φ = 924631399440.

The previous prime is 2157539164771. The next prime is 2157539164799. The reversal of 2157539164774 is 4774619357512.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157539164771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3063112 + ... + 3701044.

It is an arithmetic number, because the mean of its divisors is an integer number (156866694732).

Almost surely, 2^{2157539164774} is an apocalyptic number.

2157539164774 is a deficient number, since it is larger than the sum of its proper divisors (1607261508794).

2157539164774 is a wasteful number, since it uses less digits than its factorization.

2157539164774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672460 (or 672453 counting only the distinct ones).

The product of its digits is 44452800, while the sum is 61.

The spelling of 2157539164774 in words is "two trillion, one hundred fifty-seven billion, five hundred thirty-nine million, one hundred sixty-four thousand, seven hundred seventy-four".