2116557875380 has 24 divisors (see below), whose sum is σ = 4786677041832. Its totient is φ = 781498292352.

The previous prime is 2116557875357. The next prime is 2116557875413. The reversal of 2116557875380 is 835787556112.

It can be written as a sum of positive squares in 4 ways, for example, as 329170702756 + 1787387172624 = 573734^2 + 1336932^2 .

It is a super-2 number, since 2×2116557875380² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 4070303347 + ... + 4070303866.

It is an arithmetic number, because the mean of its divisors is an integer number (199444876743).

Almost surely, 2^{2116557875380} is an apocalyptic number.

2116557875380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2116557875380 is an abundant number, since it is smaller than the sum of its proper divisors (2670119166452).

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

2116557875380 is a wasteful number, since it uses less digits than its factorization.

2116557875380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8140607235 (or 8140607233 counting only the distinct ones).

The product of its (nonzero) digits is 14112000, while the sum is 58.

The spelling of 2116557875380 in words is "two trillion, one hundred sixteen billion, five hundred fifty-seven million, eight hundred seventy-five thousand, three hundred eighty".