25545355615530 has 96 divisors (see below), whose sum is σ = 68714749958400. Its totient is φ = 6576567801216.

The previous prime is 25545355615489. The next prime is 25545355615531. The reversal of 25545355615530 is 3551655354552.

25545355615530 is a `hidden beast` number, since 2 + 5 + 5 + 4 + 5 + 3 + 556 + 1 + 55 + 30 = 666.

It is not an unprimeable number, because it can be changed into a prime (25545355615531) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27222901 + ... + 28145639.

It is an arithmetic number, because the mean of its divisors is an integer number (715778645400).

Almost surely, 2^{25545355615530} is an apocalyptic number.

25545355615530 is an abundant number, since it is smaller than the sum of its proper divisors (43169394342870).

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

25545355615530 is a wasteful number, since it uses less digits than its factorization.

25545355615530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933388 (or 933385 counting only the distinct ones).

The product of its (nonzero) digits is 33750000, while the sum is 54.

The spelling of 25545355615530 in words is "twenty-five trillion, five hundred forty-five billion, three hundred fifty-five million, six hundred fifteen thousand, five hundred thirty".