2638811677 has 2 divisors, whose sum is σ = 2638811678. Its totient is φ = 2638811676.

The previous prime is 2638811657. The next prime is 2638811687. The reversal of 2638811677 is 7761188362.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2635692921 + 3118756 = 51339^2 + 1766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2638811677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2638811677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2638811657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319405838 + 1319405839.

It is an arithmetic number, because the mean of its divisors is an integer number (1319405839).

Almost surely, 2^2638811677 is an apocalyptic number.

It is an amenable number.

2638811677 is a deficient number, since it is larger than the sum of its proper divisors (1).

2638811677 is an equidigital number, since it uses as much as digits as its factorization.

2638811677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 49.

The square root of 2638811677 is about 51369.3651605702. The cubic root of 2638811677 is about 1381.8772458184.

The spelling of 2638811677 in words is "two billion, six hundred thirty-eight million, eight hundred eleven thousand, six hundred seventy-seven".