64397616 has 20 divisors (see below), whose sum is σ = 166360632. Its totient is φ = 21465856.

The previous prime is 64397611. The next prime is 64397623. The reversal of 64397616 is 61679346.

It is not an unprimeable number, because it can be changed into a prime (64397611) 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, 670761 + ... + 670856.

Almost surely, 2^64397616 is an apocalyptic number.

It is an amenable number.

64397616 is an abundant number, since it is smaller than the sum of its proper divisors (101963016).

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

64397616 is a wasteful number, since it uses less digits than its factorization.

64397616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341628 (or 1341622 counting only the distinct ones).

The product of its digits is 163296, while the sum is 42.

The square root of 64397616 is about 8024.8125211746. The cubic root of 64397616 is about 400.8266570849.

The spelling of 64397616 in words is "sixty-four million, three hundred ninety-seven thousand, six hundred sixteen".