25121041552 has 20 divisors (see below), whose sum is σ = 48713267196. Its totient is φ = 12549875840.

The previous prime is 25121041529. The next prime is 25121041591. The reversal of 25121041552 is 25514012152.

It can be written as a sum of positive squares in 2 ways, for example, as 23060244736 + 2060796816 = 151856^2 + 45396^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25121041552.

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, 645823 + ... + 683614.

Almost surely, 2^25121041552 is an apocalyptic number.

It is an amenable number.

25121041552 is a deficient number, since it is larger than the sum of its proper divisors (23592225644).

25121041552 is a wasteful number, since it uses less digits than its factorization.

25121041552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330626 (or 1330620 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 28.

The spelling of 25121041552 in words is "twenty-five billion, one hundred twenty-one million, forty-one thousand, five hundred fifty-two".