2657423538 has 240 divisors, whose sum is σ = 7591776192. Its totient is φ = 680011200.

The previous prime is 2657423501. The next prime is 2657423539. The reversal of 2657423538 is 8353247562.

2657423538 is a `hidden beast` number, since 2 + 6 + 574 + 23 + 53 + 8 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2657423493 and 2657423502.

It is not an unprimeable number, because it can be changed into a prime (2657423539) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 14681808 + ... + 14681988.

Almost surely, 2^2657423538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2657423538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3795888096).

2657423538 is an abundant number, since it is smaller than the sum of its proper divisors (4934352654).

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

2657423538 is a wasteful number, since it uses less digits than its factorization.

2657423538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 311 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 45.

The square root of 2657423538 is about 51550.2040539123. The cubic root of 2657423538 is about 1385.1184870849.

The spelling of 2657423538 in words is "two billion, six hundred fifty-seven million, four hundred twenty-three thousand, five hundred thirty-eight".