31432665644 has 24 divisors (see below), whose sum is σ = 58469538960. Its totient is φ = 14734278656.

The previous prime is 31432665643. The next prime is 31432665673. The reversal of 31432665644 is 44656623413.

It is a junction number, because it is equal to n+sod(n) for n = 31432665595 and 31432665604.

It is not an unprimeable number, because it can be changed into a prime (31432665643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 881834 + ... + 916785.

It is an arithmetic number, because the mean of its divisors is an integer number (2436230790).

Almost surely, 2^31432665644 is an apocalyptic number.

31432665644 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31432665644 is a deficient number, since it is larger than the sum of its proper divisors (27036873316).

31432665644 is a wasteful number, since it uses less digits than its factorization.

31432665644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798897 (or 1798895 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 44.

The spelling of 31432665644 in words is "thirty-one billion, four hundred thirty-two million, six hundred sixty-five thousand, six hundred forty-four".