64125513 has 72 divisors (see below), whose sum is σ = 109837728. Its totient is φ = 37231488.

The previous prime is 64125511. The next prime is 64125563. The reversal of 64125513 is 31552146.

64125513 is a `hidden beast` number, since 641 + 2 + 5 + 5 + 13 = 666.

It is not a de Polignac number, because 64125513 - 2¹ = 64125511 is a prime.

It is a super-2 number, since 2×64125513² = 8224162835026338, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (64125511) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1491270 + ... + 1491312.

It is an arithmetic number, because the mean of its divisors is an integer number (1525524).

Almost surely, 2^64125513 is an apocalyptic number.

It is an amenable number.

64125513 is a deficient number, since it is larger than the sum of its proper divisors (45712215).

64125513 is a wasteful number, since it uses less digits than its factorization.

64125513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113 (or 82 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 64125513 is about 8007.8407201942. The cubic root of 64125513 is about 400.2613146661.

Adding to 64125513 its reverse (31552146), we get a palindrome (95677659).

The spelling of 64125513 in words is "sixty-four million, one hundred twenty-five thousand, five hundred thirteen".