31740220544 has 32 divisors (see below), whose sum is σ = 63257984640. Its totient is φ = 15863706880.

The previous prime is 31740220541. The next prime is 31740220571. The reversal of 31740220544 is 44502204713.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 31740220544.

It is not an unprimeable number, because it can be changed into a prime (31740220541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276749 + ... + 374259.

It is an arithmetic number, because the mean of its divisors is an integer number (1976812020).

Almost surely, 2^31740220544 is an apocalyptic number.

It is an amenable number.

31740220544 is a deficient number, since it is larger than the sum of its proper divisors (31517764096).

31740220544 is an equidigital number, since it uses as much as digits as its factorization.

31740220544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100068 (or 100056 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 32.

The spelling of 31740220544 in words is "thirty-one billion, seven hundred forty million, two hundred twenty thousand, five hundred forty-four".