71533097990 has 16 divisors (see below), whose sum is σ = 132913111680. Its totient is φ = 27690231360.

The previous prime is 71533097983. The next prime is 71533098011. The reversal of 71533097990 is 9979033517.

It is a Curzon number.

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, 115375655 + ... + 115376274.

It is an arithmetic number, because the mean of its divisors is an integer number (8307069480).

Almost surely, 2^71533097990 is an apocalyptic number.

71533097990 is a deficient number, since it is larger than the sum of its proper divisors (61380013690).

71533097990 is a wasteful number, since it uses less digits than its factorization.

71533097990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230751967.

The product of its (nonzero) digits is 1607445, while the sum is 53.

The spelling of 71533097990 in words is "seventy-one billion, five hundred thirty-three million, ninety-seven thousand, nine hundred ninety".