1381831620920 has 32 divisors (see below), whose sum is σ = 3109680540720. Its totient is φ = 552633200640.

The previous prime is 1381831620899. The next prime is 1381831620977. The reversal of 1381831620920 is 290261381831.

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, 2882441 + ... + 3327480.

Almost surely, 2^{1381831620920} is an apocalyptic number.

1381831620920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1381831620920 is an abundant number, since it is smaller than the sum of its proper divisors (1727848919800).

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

1381831620920 is a wasteful number, since it uses less digits than its factorization.

1381831620920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6215495 (or 6215491 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 1381831620920 in words is "one trillion, three hundred eighty-one billion, eight hundred thirty-one million, six hundred twenty thousand, nine hundred twenty".