64081964 has 24 divisors (see below), whose sum is σ = 114690576. Its totient is φ = 31320000.

The previous prime is 64081957. The next prime is 64082017. The reversal of 64081964 is 46918046.

It is a super-2 number, since 2×64081964² = 8212996220194592, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43439 + ... + 44889.

It is an arithmetic number, because the mean of its divisors is an integer number (4778774).

Almost surely, 2^64081964 is an apocalyptic number.

It is an amenable number.

64081964 is a deficient number, since it is larger than the sum of its proper divisors (50608612).

64081964 is a wasteful number, since it uses less digits than its factorization.

64081964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1697 (or 1695 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 64081964 is about 8005.1211108890. The cubic root of 64081964 is about 400.1706854891.

The spelling of 64081964 in words is "sixty-four million, eighty-one thousand, nine hundred sixty-four".