2765616631 has 2 divisors, whose sum is σ = 2765616632. Its totient is φ = 2765616630.

The previous prime is 2765616613. The next prime is 2765616653. The reversal of 2765616631 is 1366165672.

Together with previous prime (2765616613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2765616631 is a prime.

It is a super-2 number, since 2×2765616631² = 15297270699327580322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2765616031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1382808315 + 1382808316.

It is an arithmetic number, because the mean of its divisors is an integer number (1382808316).

Almost surely, 2^2765616631 is an apocalyptic number.

2765616631 is a deficient number, since it is larger than the sum of its proper divisors (1).

2765616631 is an equidigital number, since it uses as much as digits as its factorization.

2765616631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 43.

The square root of 2765616631 is about 52589.1303502920. The cubic root of 2765616631 is about 1403.6666861287. Note that the first 4 decimals are identical.

The spelling of 2765616631 in words is "two billion, seven hundred sixty-five million, six hundred sixteen thousand, six hundred thirty-one".