31447667642 has 16 divisors (see below), whose sum is σ = 47290703040. Its totient is φ = 15684134592.

The previous prime is 31447667611. The next prime is 31447667653. The reversal of 31447667642 is 24676674413.

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, 2134433 + ... + 2149115.

It is an arithmetic number, because the mean of its divisors is an integer number (2955668940).

Almost surely, 2^31447667642 is an apocalyptic number.

31447667642 is a deficient number, since it is larger than the sum of its proper divisors (15843035398).

31447667642 is a wasteful number, since it uses less digits than its factorization.

31447667642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17317.

The product of its digits is 4064256, while the sum is 50.

The spelling of 31447667642 in words is "thirty-one billion, four hundred forty-seven million, six hundred sixty-seven thousand, six hundred forty-two".