31780453944 has 32 divisors (see below), whose sum is σ = 79461306000. Its totient is φ = 10592128512.

The previous prime is 31780453921. The next prime is 31780453961. The reversal of 31780453944 is 44935408713.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 31780453893 and 31780453902.

It is a congruent number.

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, 116362 + ... + 277670.

Almost surely, 2^31780453944 is an apocalyptic number.

It is an amenable number.

31780453944 is an abundant number, since it is smaller than the sum of its proper divisors (47680852056).

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

31780453944 is a wasteful number, since it uses less digits than its factorization.

31780453944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169527 (or 169523 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 31780453944 in words is "thirty-one billion, seven hundred eighty million, four hundred fifty-three thousand, nine hundred forty-four".