1913253932172 has 24 divisors (see below), whose sum is σ = 4870100918592. Its totient is φ = 579773918800.

The previous prime is 1913253932171. The next prime is 1913253932203. The reversal of 1913253932172 is 2712393523191.

It is not an unprimeable number, because it can be changed into a prime (1913253932171) 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, 7247173854 + ... + 7247174117.

It is an arithmetic number, because the mean of its divisors is an integer number (202920871608).

Almost surely, 2^{1913253932172} is an apocalyptic number.

1913253932172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1913253932172 is an abundant number, since it is smaller than the sum of its proper divisors (2956846986420).

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

1913253932172 is a wasteful number, since it uses less digits than its factorization.

1913253932172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14494347989 (or 14494347987 counting only the distinct ones).

The product of its digits is 612360, while the sum is 48.

The spelling of 1913253932172 in words is "one trillion, nine hundred thirteen billion, two hundred fifty-three million, nine hundred thirty-two thousand, one hundred seventy-two".