2718631122661 has 4 divisors (see below), whose sum is σ = 2718634424800. Its totient is φ = 2718627820524.

The previous prime is 2718631122653. The next prime is 2718631122667. The reversal of 2718631122661 is 1662211368172.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2718631122661 - 2³ = 2718631122653 is a prime.

It is a super-2 number, since 2×2718631122661² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2718631122667) 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, 696520 + ... + 2433598.

It is an arithmetic number, because the mean of its divisors is an integer number (679658606200).

Almost surely, 2^{2718631122661} is an apocalyptic number.

It is an amenable number.

2718631122661 is a deficient number, since it is larger than the sum of its proper divisors (3302139).

2718631122661 is a wasteful number, since it uses less digits than its factorization.

2718631122661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3302138.

The product of its digits is 290304, while the sum is 46.

The spelling of 2718631122661 in words is "two trillion, seven hundred eighteen billion, six hundred thirty-one million, one hundred twenty-two thousand, six hundred sixty-one".