2491372799999 has 4 divisors (see below), whose sum is σ = 2491382062920. Its totient is φ = 2491363537080.

The previous prime is 2491372799953. The next prime is 2491372800053. The reversal of 2491372799999 is 9999972731942.

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

It is a cyclic number.

It is not a de Polignac number, because 2491372799999 - 2¹² = 2491372795903 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 (2491372799939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4215569 + ... + 4770090.

It is an arithmetic number, because the mean of its divisors is an integer number (622845515730).

Almost surely, 2^{2491372799999} is an apocalyptic number.

2491372799999 is a deficient number, since it is larger than the sum of its proper divisors (9262921).

2491372799999 is an equidigital number, since it uses as much as digits as its factorization.

2491372799999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9262920.

The product of its digits is 1249949232, while the sum is 80.

The spelling of 2491372799999 in words is "two trillion, four hundred ninety-one billion, three hundred seventy-two million, seven hundred ninety-nine thousand, nine hundred ninety-nine".