25575547557 has 48 divisors (see below), whose sum is σ = 40456765440. Its totient is φ = 14077702464.

The previous prime is 25575547549. The next prime is 25575547579. The reversal of 25575547557 is 75574557552.

It is not a de Polignac number, because 25575547557 - 2³ = 25575547549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25575547497 and 25575547506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25575547157) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8882044 + ... + 8884922.

It is an arithmetic number, because the mean of its divisors is an integer number (842849280).

Almost surely, 2^25575547557 is an apocalyptic number.

It is an amenable number.

25575547557 is a deficient number, since it is larger than the sum of its proper divisors (14881217883).

25575547557 is a wasteful number, since it uses less digits than its factorization.

25575547557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3450 (or 3421 counting only the distinct ones).

The product of its digits is 42875000, while the sum is 57.

The spelling of 25575547557 in words is "twenty-five billion, five hundred seventy-five million, five hundred forty-seven thousand, five hundred fifty-seven".