25533986401 has 48 divisors (see below), whose sum is σ = 32725405440. Its totient is φ = 19496188800.

The previous prime is 25533986377. The next prime is 25533986441. The reversal of 25533986401 is 10468933552.

It is not a de Polignac number, because 25533986401 - 2⁵ = 25533986369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25533986441) 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, 16377660 + ... + 16379218.

It is an arithmetic number, because the mean of its divisors is an integer number (681779280).

Almost surely, 2^25533986401 is an apocalyptic number.

It is an amenable number.

25533986401 is a deficient number, since it is larger than the sum of its proper divisors (7191419039).

25533986401 is a wasteful number, since it uses less digits than its factorization.

25533986401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1966 (or 1955 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 25533986401 in words is "twenty-five billion, five hundred thirty-three million, nine hundred eighty-six thousand, four hundred one".