31385750072 has 8 divisors (see below), whose sum is σ = 58848281400. Its totient is φ = 15692875032.

The previous prime is 31385750029. The next prime is 31385750083. The reversal of 31385750072 is 27005758313.

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, 1961609372 + ... + 1961609387.

It is an arithmetic number, because the mean of its divisors is an integer number (7356035175).

Almost surely, 2^31385750072 is an apocalyptic number.

It is an amenable number.

31385750072 is a deficient number, since it is larger than the sum of its proper divisors (27462531328).

31385750072 is a wasteful number, since it uses less digits than its factorization.

31385750072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3923218765 (or 3923218761 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 41.

The spelling of 31385750072 in words is "thirty-one billion, three hundred eighty-five million, seven hundred fifty thousand, seventy-two".