64475620 has 24 divisors (see below), whose sum is σ = 147708288. Its totient is φ = 23445600.

The previous prime is 64475599. The next prime is 64475627. The reversal of 64475620 is 2657446.

It is not an unprimeable number, because it can be changed into a prime (64475627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146316 + ... + 146755.

It is an arithmetic number, because the mean of its divisors is an integer number (6154512).

Almost surely, 2^64475620 is an apocalyptic number.

It is an amenable number.

64475620 is an abundant number, since it is smaller than the sum of its proper divisors (83232668).

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

64475620 is a wasteful number, since it uses less digits than its factorization.

64475620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293091 (or 293089 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 64475620 is about 8029.6712261462. The cubic root of 64475620 is about 400.9884305010.

The spelling of 64475620 in words is "sixty-four million, four hundred seventy-five thousand, six hundred twenty".