2631894768479 has 4 divisors (see below), whose sum is σ = 2657447144976. Its totient is φ = 2606342391984.

The previous prime is 2631894768469. The next prime is 2631894768487. The reversal of 2631894768479 is 9748674981362.

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-2631894768479 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 (2631894768469) 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, 12776188094 + ... + 12776188299.

It is an arithmetic number, because the mean of its divisors is an integer number (664361786244).

Almost surely, 2^{2631894768479} is an apocalyptic number.

2631894768479 is a deficient number, since it is larger than the sum of its proper divisors (25552376497).

2631894768479 is a wasteful number, since it uses less digits than its factorization.

2631894768479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25552376496.

The product of its digits is 877879296, while the sum is 74.

The spelling of 2631894768479 in words is "two trillion, six hundred thirty-one billion, eight hundred ninety-four million, seven hundred sixty-eight thousand, four hundred seventy-nine".