64138650 has 24 divisors (see below), whose sum is σ = 159064224. Its totient is φ = 17103600.

The previous prime is 64138621. The next prime is 64138663. The reversal of 64138650 is 5683146.

It is a super-2 number, since 2×64138650² = 8227532847645000, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213646 + ... + 213945.

It is an arithmetic number, because the mean of its divisors is an integer number (6627676).

Almost surely, 2^64138650 is an apocalyptic number.

64138650 is an abundant number, since it is smaller than the sum of its proper divisors (94925574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64138650 is a wasteful number, since it uses less digits than its factorization.

64138650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427606 (or 427601 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 64138650 is about 8008.6609367609. The cubic root of 64138650 is about 400.2886458255.

The spelling of 64138650 in words is "sixty-four million, one hundred thirty-eight thousand, six hundred fifty".