623644444447 has 16 divisors (see below), whose sum is σ = 679193820000. Its totient is φ = 570373017984.

The previous prime is 623644444441. The next prime is 623644444453. The reversal of 623644444447 is 744444446326.

It is an interprime number because it is at equal distance from previous prime (623644444441) and next prime (623644444453).

It is a cyclic number.

It is not a de Polignac number, because 623644444447 - 2²⁷ = 623510226719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 623644444394 and 623644444403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623644444441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4366929 + ... + 4507477.

It is an arithmetic number, because the mean of its divisors is an integer number (42449613750).

Almost surely, 2^623644444447 is an apocalyptic number.

623644444447 is a deficient number, since it is larger than the sum of its proper divisors (55549375553).

623644444447 is a wasteful number, since it uses less digits than its factorization.

623644444447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148650.

The product of its digits is 24772608, while the sum is 52.

The spelling of 623644444447 in words is "six hundred twenty-three billion, six hundred forty-four million, four hundred forty-four thousand, four hundred forty-seven".