2091376138872 has 64 divisors (see below), whose sum is σ = 5547363736320. Its totient is φ = 654770677248.

The previous prime is 2091376138829. The next prime is 2091376138877. The reversal of 2091376138872 is 2788316731902.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091376138877) 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, 5064058 + ... + 5461449.

It is an arithmetic number, because the mean of its divisors is an integer number (86677558380).

Almost surely, 2^{2091376138872} is an apocalyptic number.

It is an amenable number.

2091376138872 is an abundant number, since it is smaller than the sum of its proper divisors (3455987597448).

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

2091376138872 is a wasteful number, since it uses less digits than its factorization.

2091376138872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10526020 (or 10526016 counting only the distinct ones).

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

The spelling of 2091376138872 in words is "two trillion, ninety-one billion, three hundred seventy-six million, one hundred thirty-eight thousand, eight hundred seventy-two".