71221105624 has 8 divisors (see below), whose sum is σ = 133539573060. Its totient is φ = 35610552808.

The previous prime is 71221105619. The next prime is 71221105661. The reversal of 71221105624 is 42650112217.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4451319094 + ... + 4451319109.

Almost surely, 2^71221105624 is an apocalyptic number.

It is an amenable number.

71221105624 is a deficient number, since it is larger than the sum of its proper divisors (62318467436).

71221105624 is a wasteful number, since it uses less digits than its factorization.

71221105624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8902638209 (or 8902638205 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The spelling of 71221105624 in words is "seventy-one billion, two hundred twenty-one million, one hundred five thousand, six hundred twenty-four".