25839790977 has 48 divisors (see below), whose sum is σ = 47084732352. Its totient is φ = 12390698880.

The previous prime is 25839790969. The next prime is 25839790987. The reversal of 25839790977 is 77909793852.

It is not a de Polignac number, because 25839790977 - 2³ = 25839790969 is a prime.

It is a super-2 number, since 2×25839790977² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25839790927) 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, 593598 + ... + 635639.

It is an arithmetic number, because the mean of its divisors is an integer number (980931924).

Almost surely, 2^25839790977 is an apocalyptic number.

It is an amenable number.

25839790977 is a deficient number, since it is larger than the sum of its proper divisors (21244941375).

25839790977 is a wasteful number, since it uses less digits than its factorization.

25839790977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229278 (or 1229271 counting only the distinct ones).

The product of its (nonzero) digits is 60011280, while the sum is 66.

The spelling of 25839790977 in words is "twenty-five billion, eight hundred thirty-nine million, seven hundred ninety thousand, nine hundred seventy-seven".