24987705625 has 15 divisors (see below), whose sum is σ = 31229575993. Its totient is φ = 19987003000.

The previous prime is 24987705623. The next prime is 24987705643. The reversal of 24987705625 is 52650778942.

The square root of 24987705625 is 158075.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 1959036121 + 23028669504 = 44261^2 + 151752^2 .

It is not a de Polignac number, because 24987705625 - 2¹ = 24987705623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (24987705623) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 3948714 + ... + 3955036.

Almost surely, 2^24987705625 is an apocalyptic number.

24987705625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

24987705625 is the 158075-th square number.

24987705625 is the 79038-th centered octagonal number.

It is an amenable number.

24987705625 is a deficient number, since it is larger than the sum of its proper divisors (6241870368).

24987705625 is an frugal number, since it uses more digits than its factorization.

24987705625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12666 (or 6328 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 55.

The spelling of 24987705625 in words is "twenty-four billion, nine hundred eighty-seven million, seven hundred five thousand, six hundred twenty-five".