25582507508 has 6 divisors (see below), whose sum is σ = 44769388146. Its totient is φ = 12791253752.

The previous prime is 25582507501. The next prime is 25582507519. The reversal of 25582507508 is 80570528552.

It can be written as a sum of positive squares in only one way, i.e., 21159193444 + 4423314064 = 145462^2 + 66508^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25582507501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3197813435 + ... + 3197813442.

It is an arithmetic number, because the mean of its divisors is an integer number (7461564691).

Almost surely, 2^25582507508 is an apocalyptic number.

It is an amenable number.

25582507508 is a deficient number, since it is larger than the sum of its proper divisors (19186880638).

25582507508 is a wasteful number, since it uses less digits than its factorization.

25582507508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6395626881 (or 6395626879 counting only the distinct ones).

The product of its (nonzero) digits is 1120000, while the sum is 47.

The spelling of 25582507508 in words is "twenty-five billion, five hundred eighty-two million, five hundred seven thousand, five hundred eight".