64547925 has 48 divisors (see below), whose sum is σ = 115825920. Its totient is φ = 31530240.

The previous prime is 64547909. The next prime is 64547927. The reversal of 64547925 is 52974546.

It is not a de Polignac number, because 64547925 - 2⁴ = 64547909 is a prime.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64547927) 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, 232887 + ... + 233163.

It is an arithmetic number, because the mean of its divisors is an integer number (2413040).

Almost surely, 2^64547925 is an apocalyptic number.

64547925 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64547925 is a deficient number, since it is larger than the sum of its proper divisors (51277995).

64547925 is a wasteful number, since it uses less digits than its factorization.

64547925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542 (or 537 counting only the distinct ones).

The product of its digits is 302400, while the sum is 42.

The square root of 64547925 is about 8034.1723282489. The cubic root of 64547925 is about 401.1382682079.

The spelling of 64547925 in words is "sixty-four million, five hundred forty-seven thousand, nine hundred twenty-five".