64140965 has 32 divisors (see below), whose sum is σ = 90720000. Its totient is φ = 42628608.

The previous prime is 64140931. The next prime is 64141003. The reversal of 64140965 is 56904146.

It is a cyclic number.

It is not a de Polignac number, because 64140965 - 2¹⁸ = 63878821 is a prime.

It is a super-2 number, since 2×64140965² = 8228126782262450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183611 + ... + 183959.

It is an arithmetic number, because the mean of its divisors is an integer number (2835000).

Almost surely, 2^64140965 is an apocalyptic number.

It is an amenable number.

64140965 is a deficient number, since it is larger than the sum of its proper divisors (26579035).

64140965 is a wasteful number, since it uses less digits than its factorization.

64140965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 64140965 is about 8008.8054664850. The cubic root of 64140965 is about 400.2934617312.

The spelling of 64140965 in words is "sixty-four million, one hundred forty thousand, nine hundred sixty-five".