2840920212491 has 4 divisors (see below), whose sum is σ = 2840929199472. Its totient is φ = 2840911225512.

The previous prime is 2840920212421. The next prime is 2840920212497. The reversal of 2840920212491 is 1942120290482.

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-2840920212491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2840920212497) 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, 4001351 + ... + 4657536.

It is an arithmetic number, because the mean of its divisors is an integer number (710232299868).

Almost surely, 2^{2840920212491} is an apocalyptic number.

2840920212491 is a deficient number, since it is larger than the sum of its proper divisors (8986981).

2840920212491 is an equidigital number, since it uses as much as digits as its factorization.

2840920212491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8986980.

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 2840920212491 in words is "two trillion, eight hundred forty billion, nine hundred twenty million, two hundred twelve thousand, four hundred ninety-one".