2691396664092 has 18 divisors (see below), whose sum is σ = 6803252678768. Its totient is φ = 897132221352.

The previous prime is 2691396664081. The next prime is 2691396664163. The reversal of 2691396664092 is 2904666931962.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37380509188 + ... + 37380509259.

Almost surely, 2^{2691396664092} is an apocalyptic number.

It is an amenable number.

2691396664092 is an abundant number, since it is smaller than the sum of its proper divisors (4111856014676).

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

2691396664092 is a wasteful number, since it uses less digits than its factorization.

2691396664092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74761018457 (or 74761018452 counting only the distinct ones).

The product of its (nonzero) digits is 45349632, while the sum is 63.

The spelling of 2691396664092 in words is "two trillion, six hundred ninety-one billion, three hundred ninety-six million, six hundred sixty-four thousand, ninety-two".