25555555530 has 96 divisors (see below), whose sum is σ = 71207420544. Its totient is φ = 6342323328.

The previous prime is 25555555489. The next prime is 25555555549. The reversal of 25555555530 is 3555555552.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 90244 + ... + 243423.

It is an arithmetic number, because the mean of its divisors is an integer number (741743964).

Almost surely, 2^25555555530 is an apocalyptic number.

25555555530 is an abundant number, since it is smaller than the sum of its proper divisors (45651865014).

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

25555555530 is a wasteful number, since it uses less digits than its factorization.

25555555530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333740 (or 333737 counting only the distinct ones).

The product of its (nonzero) digits is 2343750, while the sum is 45.

It can be divided in two parts, 25 and 555555530, that added together give a palindrome (555555555).

The spelling of 25555555530 in words is "twenty-five billion, five hundred fifty-five million, five hundred fifty-five thousand, five hundred thirty".