7725732057 has 12 divisors (see below), whose sum is σ = 11195744560. Its totient is φ = 5133709368.

The previous prime is 7725732043. The next prime is 7725732073. The reversal of 7725732057 is 7502375277.

It is a happy number.

7725732057 is a `hidden beast` number, since 7 + 7 + 2 + 573 + 20 + 57 = 666.

It is not a de Polignac number, because 7725732057 - 2¹⁶ = 7725666521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7725732257) 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, 1395307 + ... + 1400832.

Almost surely, 2^7725732057 is an apocalyptic number.

It is an amenable number.

7725732057 is a deficient number, since it is larger than the sum of its proper divisors (3470012503).

7725732057 is a wasteful number, since it uses less digits than its factorization.

7725732057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2796452 (or 2796449 counting only the distinct ones).

The product of its (nonzero) digits is 720300, while the sum is 45.

The square root of 7725732057 is about 87896.1435843462. The cubic root of 7725732057 is about 1976.8780560671.

The spelling of 7725732057 in words is "seven billion, seven hundred twenty-five million, seven hundred thirty-two thousand, fifty-seven".