64140975 has 18 divisors (see below), whose sum is σ = 114884016. Its totient is φ = 34208400.

The previous prime is 64140931. The next prime is 64141003. The reversal of 64140975 is 57904146.

64140975 is a `hidden beast` number, since 641 + 4 + 0 + 9 + 7 + 5 = 666.

It is not a de Polignac number, because 64140975 - 2⁶ = 64140911 is a prime.

It is a super-2 number, since 2×64140975² = 8228129347901250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 142311 + ... + 142760.

Almost surely, 2^64140975 is an apocalyptic number.

64140975 is a deficient number, since it is larger than the sum of its proper divisors (50743041).

64140975 is a wasteful number, since it uses less digits than its factorization.

64140975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285087 (or 285079 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 64140975 is about 8008.8060907978. The cubic root of 64140975 is about 400.2934825340.

It can be divided in two parts, 641 and 40975, that added together give a triangular number (41616 = T₂₈₈).

The spelling of 64140975 in words is "sixty-four million, one hundred forty thousand, nine hundred seventy-five".