64721596 has 12 divisors (see below), whose sum is σ = 113320648. Its totient is φ = 32344272.

The previous prime is 64721561. The next prime is 64721599. The reversal of 64721596 is 69512746.

It is a super-3 number, since 3×64721596³ (a number of 24 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64721599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10210 + ... + 15286.

Almost surely, 2^64721596 is an apocalyptic number.

It is an amenable number.

64721596 is a deficient number, since it is larger than the sum of its proper divisors (48599052).

64721596 is a wasteful number, since it uses less digits than its factorization.

64721596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8268 (or 8266 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The square root of 64721596 is about 8044.9733374325. The cubic root of 64721596 is about 401.4977101616.

The spelling of 64721596 in words is "sixty-four million, seven hundred twenty-one thousand, five hundred ninety-six".