2505211839791 has 4 divisors (see below), whose sum is σ = 2505851417832. Its totient is φ = 2504572261752.

The previous prime is 2505211839761. The next prime is 2505211839817. The reversal of 2505211839791 is 1979381125052.

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 2505211839791 - 2¹⁴ = 2505211823407 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 (2505211839731) 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, 319783145 + ... + 319790978.

It is an arithmetic number, because the mean of its divisors is an integer number (626462854458).

Almost surely, 2^{2505211839791} is an apocalyptic number.

2505211839791 is a deficient number, since it is larger than the sum of its proper divisors (639578041).

2505211839791 is an equidigital number, since it uses as much as digits as its factorization.

2505211839791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639578040.

The product of its (nonzero) digits is 1360800, while the sum is 53.

The spelling of 2505211839791 in words is "two trillion, five hundred five billion, two hundred eleven million, eight hundred thirty-nine thousand, seven hundred ninety-one".