71432221824 has 48 divisors (see below), whose sum is σ = 205553662470. Its totient is φ = 23810740224.

The previous prime is 71432221813. The next prime is 71432221831. The reversal of 71432221824 is 42812223417.

71432221824 is a `hidden beast` number, since 7 + 1 + 432 + 2 + 218 + 2 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 70522113600 + 910108224 = 265560^2 + 30168^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31002417 + ... + 31004720.

Almost surely, 2^71432221824 is an apocalyptic number.

It is an amenable number.

71432221824 is an abundant number, since it is smaller than the sum of its proper divisors (134121440646).

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

71432221824 is a wasteful number, since it uses less digits than its factorization.

71432221824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62007157 (or 62007142 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The spelling of 71432221824 in words is "seventy-one billion, four hundred thirty-two million, two hundred twenty-one thousand, eight hundred twenty-four".