1231393730560 has 104 divisors (see below), whose sum is σ = 3377125185696. Its totient is φ = 422192087040.

The previous prime is 1231393730549. The next prime is 1231393730587. The reversal of 1231393730560 is 650373931321.

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, 4151401 + ... + 4438120.

Almost surely, 2^{1231393730560} is an apocalyptic number.

1231393730560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231393730560 is an abundant number, since it is smaller than the sum of its proper divisors (2145731455136).

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

1231393730560 is an frugal number, since it uses more digits than its factorization.

1231393730560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8589557 (or 8589535 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 43.

The spelling of 1231393730560 in words is "one trillion, two hundred thirty-one billion, three hundred ninety-three million, seven hundred thirty thousand, five hundred sixty".