31471630161906 has 64 divisors (see below), whose sum is σ = 68755259289600. Its totient is φ = 9524378055360.

The previous prime is 31471630161901. The next prime is 31471630161931. The reversal of 31471630161906 is 60916103617413.

It is not an unprimeable number, because it can be changed into a prime (31471630161901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 304466320 + ... + 304569668.

It is an arithmetic number, because the mean of its divisors is an integer number (1074300926400).

Almost surely, 2^{31471630161906} is an apocalyptic number.

31471630161906 is an abundant number, since it is smaller than the sum of its proper divisors (37283629127694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31471630161906 is a wasteful number, since it uses less digits than its factorization.

31471630161906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109359.

The product of its (nonzero) digits is 489888, while the sum is 48.

The spelling of 31471630161906 in words is "thirty-one trillion, four hundred seventy-one billion, six hundred thirty million, one hundred sixty-one thousand, nine hundred six".