2113397779687 has 16 divisors (see below), whose sum is σ = 2128151849824. Its totient is φ = 2098680192000.

The previous prime is 2113397779679. The next prime is 2113397779693. The reversal of 2113397779687 is 7869777933112.

It is a cyclic number.

It is not a de Polignac number, because 2113397779687 - 2³ = 2113397779679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113397779607) 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, 591820612 + ... + 591824182.

It is an arithmetic number, because the mean of its divisors is an integer number (133009490614).

Almost surely, 2^{2113397779687} is an apocalyptic number.

2113397779687 is a deficient number, since it is larger than the sum of its proper divisors (14754070137).

2113397779687 is a wasteful number, since it uses less digits than its factorization.

2113397779687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7570.

The product of its digits is 168031584, while the sum is 70.

The spelling of 2113397779687 in words is "two trillion, one hundred thirteen billion, three hundred ninety-seven million, seven hundred seventy-nine thousand, six hundred eighty-seven".