54640025 has 24 divisors (see below), whose sum is σ = 74245248. Its totient is φ = 39560000.

The previous prime is 54640021. The next prime is 54640039. The reversal of 54640025 is 52004645.

It is not a de Polignac number, because 54640025 - 2² = 54640021 is a prime.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 54639976 and 54640003.

It is not an unprimeable number, because it can be changed into a prime (54640021) 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, 118295 + ... + 118755.

It is an arithmetic number, because the mean of its divisors is an integer number (3093552).

Almost surely, 2^54640025 is an apocalyptic number.

54640025 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

54640025 is a deficient number, since it is larger than the sum of its proper divisors (19605223).

54640025 is a wasteful number, since it uses less digits than its factorization.

54640025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913 (or 908 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 54640025 is about 7391.8891360734. The cubic root of 54640025 is about 379.4637519241.

The spelling of 54640025 in words is "fifty-four million, six hundred forty thousand, twenty-five".