1917064872660 has 96 divisors (see below), whose sum is σ = 6136305702912. Its totient is φ = 438064963200.

The previous prime is 1917064872637. The next prime is 1917064872677. The reversal of 1917064872660 is 662784607191.

It is a self number, because there is not a number n which added to its sum of digits gives 1917064872660.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 891735 + ... + 2151585.

It is an arithmetic number, because the mean of its divisors is an integer number (63919851072).

Almost surely, 2^{1917064872660} is an apocalyptic number.

1917064872660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1917064872660 is an abundant number, since it is smaller than the sum of its proper divisors (4219240830252).

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

1917064872660 is a wasteful number, since it uses less digits than its factorization.

1917064872660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263493 (or 1263491 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 57.

The spelling of 1917064872660 in words is "one trillion, nine hundred seventeen billion, sixty-four million, eight hundred seventy-two thousand, six hundred sixty".