1020997791180 has 72 divisors (see below), whose sum is σ = 3140646765984. Its totient is φ = 268431340800.

The previous prime is 1020997791161. The next prime is 1020997791193. The reversal of 1020997791180 is 811977990201.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39932361 + ... + 39957920.

It is an arithmetic number, because the mean of its divisors is an integer number (43620093972).

Almost surely, 2^{1020997791180} is an apocalyptic number.

1020997791180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020997791180 is an abundant number, since it is smaller than the sum of its proper divisors (2119648974804).

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

1020997791180 is a wasteful number, since it uses less digits than its factorization.

1020997791180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79890367 (or 79890362 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 54.

The spelling of 1020997791180 in words is "one trillion, twenty billion, nine hundred ninety-seven million, seven hundred ninety-one thousand, one hundred eighty".