25207767988 has 12 divisors (see below), whose sum is σ = 47506947460. Its totient is φ = 11634354432.

The previous prime is 25207767971. The next prime is 25207767997. The reversal of 25207767988 is 88976770252.

It can be written as a sum of positive squares in 2 ways, for example, as 7476715024 + 17731052964 = 86468^2 + 133158^2 .

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242382333 + ... + 242382436.

Almost surely, 2^25207767988 is an apocalyptic number.

It is an amenable number.

25207767988 is a deficient number, since it is larger than the sum of its proper divisors (22299179472).

25207767988 is a wasteful number, since it uses less digits than its factorization.

25207767988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484764786 (or 484764784 counting only the distinct ones).

The product of its (nonzero) digits is 23708160, while the sum is 61.

The spelling of 25207767988 in words is "twenty-five billion, two hundred seven million, seven hundred sixty-seven thousand, nine hundred eighty-eight".