311269739491 has 4 divisors (see below), whose sum is σ = 311275269432. Its totient is φ = 311264209552.

The previous prime is 311269739449. The next prime is 311269739513. The reversal of 311269739491 is 194937962113.

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 311269739491 - 2¹⁵ = 311269706723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311269737491) 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, 2679661 + ... + 2793406.

It is an arithmetic number, because the mean of its divisors is an integer number (77818817358).

Almost surely, 2^311269739491 is an apocalyptic number.

311269739491 is a deficient number, since it is larger than the sum of its proper divisors (5529941).

311269739491 is an equidigital number, since it uses as much as digits as its factorization.

311269739491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5529940.

The product of its digits is 2204496, while the sum is 55.

The spelling of 311269739491 in words is "three hundred eleven billion, two hundred sixty-nine million, seven hundred thirty-nine thousand, four hundred ninety-one".