71643952 has 20 divisors (see below), whose sum is σ = 140713960. Its totient is φ = 35330688.

The previous prime is 71643947. The next prime is 71643983. The reversal of 71643952 is 25934617.

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, 29502 + ... + 31837.

It is an arithmetic number, because the mean of its divisors is an integer number (7035698).

Almost surely, 2^71643952 is an apocalyptic number.

It is an amenable number.

71643952 is a deficient number, since it is larger than the sum of its proper divisors (69070008).

71643952 is a wasteful number, since it uses less digits than its factorization.

71643952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61420 (or 61414 counting only the distinct ones).

The product of its digits is 45360, while the sum is 37.

The square root of 71643952 is about 8464.2750427901. The cubic root of 71643952 is about 415.3298814168.

The spelling of 71643952 in words is "seventy-one million, six hundred forty-three thousand, nine hundred fifty-two".