64118538 has 48 divisors (see below), whose sum is σ = 153721152. Its totient is φ = 19152000.

The previous prime is 64118519. The next prime is 64118539. The reversal of 64118538 is 83581146.

64118538 is a `hidden beast` number, since 6 + 4 + 118 + 538 = 666.

It is a super-2 number, since 2×64118538² = 8222373830514888, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64118539) 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, 11778 + ... + 16338.

It is an arithmetic number, because the mean of its divisors is an integer number (3202524).

Almost surely, 2^64118538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64118538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76860576).

64118538 is an abundant number, since it is smaller than the sum of its proper divisors (89602614).

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

64118538 is a wasteful number, since it uses less digits than its factorization.

64118538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4651 (or 4648 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 64118538 is about 8007.4051976904. The cubic root of 64118538 is about 400.2468018575.

The spelling of 64118538 in words is "sixty-four million, one hundred eighteen thousand, five hundred thirty-eight".