623706441561 has 384 divisors, whose sum is σ = 1197867008000. Its totient is φ = 311098475520.

The previous prime is 623706441559. The next prime is 623706441569. The reversal of 623706441561 is 165144607326.

623706441561 is a `hidden beast` number, since 6 + 23 + 7 + 0 + 64 + 4 + 1 + 561 = 666.

623706441561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 623706441561 - 2¹ = 623706441559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (623706441569) by changing a digit.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 4911074280 + ... + 4911074406.

Almost surely, 2^623706441561 is an apocalyptic number.

It is an amenable number.

623706441561 is a deficient number, since it is larger than the sum of its proper divisors (574160566439).

623706441561 is a wasteful number, since it uses less digits than its factorization.

623706441561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 623706441561 in words is "six hundred twenty-three billion, seven hundred six million, four hundred forty-one thousand, five hundred sixty-one".