164640464 has 40 divisors (see below), whose sum is σ = 331844832. Its totient is φ = 79067520.

The previous prime is 164640449. The next prime is 164640481. The reversal of 164640464 is 464046461.

It is a super-2 number, since 2×164640464² = 54212964772270592, which contains 22 as substring.

It is a congruent number.

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, 40007 + ... + 43929.

Almost surely, 2^164640464 is an apocalyptic number.

It is an amenable number.

164640464 is an abundant number, since it is smaller than the sum of its proper divisors (167204368).

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

164640464 is a wasteful number, since it uses less digits than its factorization.

164640464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4035 (or 4029 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 35.

The square root of 164640464 is about 12831.2300267745. The cubic root of 164640464 is about 548.0819846437.

The spelling of 164640464 in words is "one hundred sixty-four million, six hundred forty thousand, four hundred sixty-four".