623108823144721 has 4 divisors (see below), whose sum is σ = 623111934269412. Its totient is φ = 623105712020032.

The previous prime is 623108823144667. The next prime is 623108823144739. The reversal of 623108823144721 is 127441328801326.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 470750262368400 + 152358560776321 = 21696780^2 + 12343361^2 .

It is a cyclic number.

It is not a de Polignac number, because 623108823144721 - 2¹⁵ = 623108823111953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (623108823124721) 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, 1555261900 + ... + 1555662493.

It is an arithmetic number, because the mean of its divisors is an integer number (155777983567353).

Almost surely, 2^{623108823144721} is an apocalyptic number.

It is an amenable number.

623108823144721 is a deficient number, since it is larger than the sum of its proper divisors (3111124691).

623108823144721 is a wasteful number, since it uses less digits than its factorization.

623108823144721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3111124690.

The product of its (nonzero) digits is 3096576, while the sum is 52.

The spelling of 623108823144721 in words is "six hundred twenty-three trillion, one hundred eight billion, eight hundred twenty-three million, one hundred forty-four thousand, seven hundred twenty-one".