2661360361623 has 24 divisors (see below), whose sum is σ = 3883993482096. Its totient is φ = 1755869760000.

The previous prime is 2661360361609. The next prime is 2661360361669. The reversal of 2661360361623 is 3261630631662.

2661360361623 is a `hidden beast` number, since 2 + 6 + 6 + 1 + 3 + 6 + 0 + 3 + 616 + 23 = 666.

It is not a de Polignac number, because 2661360361623 - 2²⁰ = 2661359313047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661360361603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24127948 + ... + 24237998.

It is an arithmetic number, because the mean of its divisors is an integer number (161833061754).

Almost surely, 2^{2661360361623} is an apocalyptic number.

2661360361623 is a deficient number, since it is larger than the sum of its proper divisors (1222633120473).

2661360361623 is a wasteful number, since it uses less digits than its factorization.

2661360361623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137855 (or 137852 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 45.

The spelling of 2661360361623 in words is "two trillion, six hundred sixty-one billion, three hundred sixty million, three hundred sixty-one thousand, six hundred twenty-three".