2718913861 has 2 divisors, whose sum is σ = 2718913862. Its totient is φ = 2718913860.

The previous prime is 2718913823. The next prime is 2718913871. The reversal of 2718913861 is 1683198172.

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., 2582164225 + 136749636 = 50815^2 + 11694^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2718913861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2718913871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1359456930 + 1359456931.

It is an arithmetic number, because the mean of its divisors is an integer number (1359456931).

Almost surely, 2^2718913861 is an apocalyptic number.

It is an amenable number.

2718913861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2718913861 is an equidigital number, since it uses as much as digits as its factorization.

2718913861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 46.

The square root of 2718913861 is about 52143.2053195812. The cubic root of 2718913861 is about 1395.7205821460.

The spelling of 2718913861 in words is "two billion, seven hundred eighteen million, nine hundred thirteen thousand, eight hundred sixty-one".