25138902775 has 24 divisors (see below), whose sum is σ = 35631390080. Its totient is φ = 17235214560.

The previous prime is 25138902769. The next prime is 25138902781. The reversal of 25138902775 is 57720983152.

It is an interprime number because it is at equal distance from previous prime (25138902769) and next prime (25138902781).

It is not a de Polignac number, because 25138902775 - 2⁵ = 25138902743 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1895116 + ... + 1908334.

Almost surely, 2^25138902775 is an apocalyptic number.

25138902775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25138902775 is a deficient number, since it is larger than the sum of its proper divisors (10492487305).

25138902775 is a wasteful number, since it uses less digits than its factorization.

25138902775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24103 (or 24098 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 49.

The spelling of 25138902775 in words is "twenty-five billion, one hundred thirty-eight million, nine hundred two thousand, seven hundred seventy-five".