25475242077 has 12 divisors (see below), whose sum is σ = 36853250044. Its totient is φ = 16957797120.

The previous prime is 25475242073. The next prime is 25475242139. The reversal of 25475242077 is 77024257452.

25475242077 is a `hidden beast` number, since 2 + 54 + 7 + 524 + 2 + 0 + 77 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17965113156 + 7510128921 = 134034^2 + 86661^2 .

It is not a de Polignac number, because 25475242077 - 2² = 25475242073 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25475242073) 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, 2135188 + ... + 2147085.

Almost surely, 2^25475242077 is an apocalyptic number.

It is an amenable number.

25475242077 is a deficient number, since it is larger than the sum of its proper divisors (11378007967).

25475242077 is a wasteful number, since it uses less digits than its factorization.

25475242077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4282940 (or 4282937 counting only the distinct ones).

The product of its (nonzero) digits is 1097600, while the sum is 45.

The spelling of 25475242077 in words is "twenty-five billion, four hundred seventy-five million, two hundred forty-two thousand, seventy-seven".