2504756649691 has 4 divisors (see below), whose sum is σ = 2504766244432. Its totient is φ = 2504747054952.

The previous prime is 2504756649623. The next prime is 2504756649779. The reversal of 2504756649691 is 1969466574052.

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 2504756649691 - 2⁴¹ = 305733394139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2504756649491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4394511 + ... + 4931656.

It is an arithmetic number, because the mean of its divisors is an integer number (626191561108).

Almost surely, 2^{2504756649691} is an apocalyptic number.

2504756649691 is a deficient number, since it is larger than the sum of its proper divisors (9594741).

2504756649691 is an equidigital number, since it uses as much as digits as its factorization.

2504756649691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9594740.

The product of its (nonzero) digits is 97977600, while the sum is 64.

The spelling of 2504756649691 in words is "two trillion, five hundred four billion, seven hundred fifty-six million, six hundred forty-nine thousand, six hundred ninety-one".