2718777961 has 4 divisors (see below), whose sum is σ = 2728810624. Its totient is φ = 2708745300.

The previous prime is 2718777947. The next prime is 2718777967. The reversal of 2718777961 is 1697778172.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2718777961 - 2⁹ = 2718777449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2718777967) 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, 5015925 + ... + 5016466.

It is an arithmetic number, because the mean of its divisors is an integer number (682202656).

Almost surely, 2^2718777961 is an apocalyptic number.

It is an amenable number.

2718777961 is a deficient number, since it is larger than the sum of its proper divisors (10032663).

2718777961 is a wasteful number, since it uses less digits than its factorization.

2718777961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10032662.

The product of its digits is 2074464, while the sum is 55.

The square root of 2718777961 is about 52141.9021613136. The cubic root of 2718777961 is about 1395.6973275675.

The spelling of 2718777961 in words is "two billion, seven hundred eighteen million, seven hundred seventy-seven thousand, nine hundred sixty-one".