25251553530 has 48 divisors (see below), whose sum is σ = 75033189504. Its totient is φ = 5771783520.

The previous prime is 25251553529. The next prime is 25251553531. The reversal of 25251553530 is 3535515252.

25251553530 is a `hidden beast` number, since 2 + 5 + 2 + 51 + 553 + 53 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (25251553529) and next prime (25251553531).

It is not an unprimeable number, because it can be changed into a prime (25251553531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20040286 + ... + 20041545.

It is an arithmetic number, because the mean of its divisors is an integer number (1563191448).

Almost surely, 2^25251553530 is an apocalyptic number.

25251553530 is an abundant number, since it is smaller than the sum of its proper divisors (49781635974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25251553530 is a wasteful number, since it uses less digits than its factorization.

25251553530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40081851 (or 40081848 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 36.

The spelling of 25251553530 in words is "twenty-five billion, two hundred fifty-one million, five hundred fifty-three thousand, five hundred thirty".