64501893 has 16 divisors (see below), whose sum is σ = 101180160. Its totient is φ = 40471488.

The previous prime is 64501891. The next prime is 64501939. The reversal of 64501893 is 39810546.

64501893 is a `hidden beast` number, since 64 + 501 + 8 + 93 = 666.

It is not a de Polignac number, because 64501893 - 2¹ = 64501891 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64501891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69805 + ... + 70722.

It is an arithmetic number, because the mean of its divisors is an integer number (6323760).

Almost surely, 2^64501893 is an apocalyptic number.

It is an amenable number.

64501893 is a deficient number, since it is larger than the sum of its proper divisors (36678267).

64501893 is a wasteful number, since it uses less digits than its factorization.

64501893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140553 (or 140547 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 64501893 is about 8031.3070542721. The cubic root of 64501893 is about 401.0428890099.

The spelling of 64501893 in words is "sixty-four million, five hundred one thousand, eight hundred ninety-three".