64127725 has 6 divisors (see below), whose sum is σ = 79518410. Its totient is φ = 51302160.

The previous prime is 64127719. The next prime is 64127743. The reversal of 64127725 is 52772146.

It can be written as a sum of positive squares in 3 ways, for example, as 8684809 + 55442916 = 2947^2 + 7446^2 .

It is not a de Polignac number, because 64127725 - 2⁷ = 64127597 is a prime.

It is a super-2 number, since 2×64127725² = 8224730227351250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1282530 + ... + 1282579.

Almost surely, 2^64127725 is an apocalyptic number.

It is an amenable number.

64127725 is a deficient number, since it is larger than the sum of its proper divisors (15390685).

64127725 is a wasteful number, since it uses less digits than its factorization.

64127725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2565119 (or 2565114 counting only the distinct ones).

The product of its digits is 23520, while the sum is 34.

The square root of 64127725 is about 8007.9788336384. The cubic root of 64127725 is about 400.2659169313.

The spelling of 64127725 in words is "sixty-four million, one hundred twenty-seven thousand, seven hundred twenty-five".