71506464 has 24 divisors (see below), whose sum is σ = 187704720. Its totient is φ = 23835456.

The previous prime is 71506451. The next prime is 71506529. The reversal of 71506464 is 46460517.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×71506464² = 10226348787566592, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372334 + ... + 372525.

It is an arithmetic number, because the mean of its divisors is an integer number (7821030).

Almost surely, 2^71506464 is an apocalyptic number.

It is an amenable number.

71506464 is an abundant number, since it is smaller than the sum of its proper divisors (116198256).

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

71506464 is a wasteful number, since it uses less digits than its factorization.

71506464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744872 (or 744864 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 71506464 is about 8456.1494783382. The cubic root of 71506464 is about 415.0640323125.

The spelling of 71506464 in words is "seventy-one million, five hundred six thousand, four hundred sixty-four".