71531372630 has 8 divisors (see below), whose sum is σ = 128756470752. Its totient is φ = 28612549048.

The previous prime is 71531372621. The next prime is 71531372657. The reversal of 71531372630 is 3627313517.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 3576568622 + ... + 3576568641.

It is an arithmetic number, because the mean of its divisors is an integer number (16094558844).

Almost surely, 2^71531372630 is an apocalyptic number.

71531372630 is a deficient number, since it is larger than the sum of its proper divisors (57225098122).

71531372630 is a wasteful number, since it uses less digits than its factorization.

71531372630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7153137270.

The product of its (nonzero) digits is 79380, while the sum is 38.

The spelling of 71531372630 in words is "seventy-one billion, five hundred thirty-one million, three hundred seventy-two thousand, six hundred thirty".