25775557577 has 24 divisors (see below), whose sum is σ = 32390960448. Its totient is φ = 20077564320.

The previous prime is 25775557571. The next prime is 25775557579. The reversal of 25775557577 is 77575557752.

It is not a de Polignac number, because 25775557577 - 2⁶ = 25775557513 is a prime.

It is a super-2 number, since 2×25775557577² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25775557571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4505723 + ... + 4511439.

It is an arithmetic number, because the mean of its divisors is an integer number (1349623352).

Almost surely, 2^25775557577 is an apocalyptic number.

It is an amenable number.

25775557577 is a deficient number, since it is larger than the sum of its proper divisors (6615402871).

25775557577 is a wasteful number, since it uses less digits than its factorization.

25775557577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11069 (or 11058 counting only the distinct ones).

The product of its digits is 105043750, while the sum is 62.

The spelling of 25775557577 in words is "twenty-five billion, seven hundred seventy-five million, five hundred fifty-seven thousand, five hundred seventy-seven".