2138952836591 has 4 divisors (see below), whose sum is σ = 2231950786032. Its totient is φ = 2045954887152.

The previous prime is 2138952836567. The next prime is 2138952836609. The reversal of 2138952836591 is 1956382598312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2138952836591 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 (2138952836491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46498974686 + ... + 46498974731.

It is an arithmetic number, because the mean of its divisors is an integer number (557987696508).

Almost surely, 2^{2138952836591} is an apocalyptic number.

2138952836591 is a deficient number, since it is larger than the sum of its proper divisors (92997949441).

2138952836591 is an equidigital number, since it uses as much as digits as its factorization.

2138952836591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92997949440.

The product of its digits is 27993600, while the sum is 62.

The spelling of 2138952836591 in words is "two trillion, one hundred thirty-eight billion, nine hundred fifty-two million, eight hundred thirty-six thousand, five hundred ninety-one".