2099517279780 has 48 divisors (see below), whose sum is σ = 5932580955840. Its totient is φ = 554734839168.

The previous prime is 2099517279751. The next prime is 2099517279781. The reversal of 2099517279780 is 879727159902.

It is not an unprimeable number, because it can be changed into a prime (2099517279781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160507014 + ... + 160520093.

It is an arithmetic number, because the mean of its divisors is an integer number (123595436580).

Almost surely, 2^{2099517279780} is an apocalyptic number.

2099517279780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2099517279780 is an abundant number, since it is smaller than the sum of its proper divisors (3833063676060).

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

2099517279780 is a wasteful number, since it uses less digits than its factorization.

2099517279780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321027228 (or 321027226 counting only the distinct ones).

The product of its (nonzero) digits is 40007520, while the sum is 66.

The spelling of 2099517279780 in words is "two trillion, ninety-nine billion, five hundred seventeen million, two hundred seventy-nine thousand, seven hundred eighty".