64135791 has 24 divisors (see below), whose sum is σ = 97212960. Its totient is φ = 40689600.

The previous prime is 64135783. The next prime is 64135793. The reversal of 64135791 is 19753146.

64135791 is a `hidden beast` number, since 641 + 3 + 5 + 7 + 9 + 1 = 666.

It is not a de Polignac number, because 64135791 - 2³ = 64135783 is a prime.

It is a super-2 number, since 2×64135791² = 8226799374391362, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64135793) 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, 16801 + ... + 20261.

It is an arithmetic number, because the mean of its divisors is an integer number (4050540).

Almost surely, 2^64135791 is an apocalyptic number.

64135791 is a deficient number, since it is larger than the sum of its proper divisors (33077169).

64135791 is a wasteful number, since it uses less digits than its factorization.

64135791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3567 (or 3564 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 64135791 is about 8008.4824405127. The cubic root of 64135791 is about 400.2826980741.

The spelling of 64135791 in words is "sixty-four million, one hundred thirty-five thousand, seven hundred ninety-one".