31712447684 has 6 divisors (see below), whose sum is σ = 55496783454. Its totient is φ = 15856223840.

The previous prime is 31712447671. The next prime is 31712447707. The reversal of 31712447684 is 48674421713.

It can be written as a sum of positive squares in only one way, i.e., 31325460100 + 386987584 = 176990^2 + 19672^2 .

It is a super-2 number, since 2×31712447684² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3964055957 + ... + 3964055964.

It is an arithmetic number, because the mean of its divisors is an integer number (9249463909).

Almost surely, 2^31712447684 is an apocalyptic number.

It is an amenable number.

31712447684 is a deficient number, since it is larger than the sum of its proper divisors (23784335770).

31712447684 is a wasteful number, since it uses less digits than its factorization.

31712447684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7928111925 (or 7928111923 counting only the distinct ones).

The product of its digits is 903168, while the sum is 47.

The spelling of 31712447684 in words is "thirty-one billion, seven hundred twelve million, four hundred forty-seven thousand, six hundred eighty-four".