623445544325 has 12 divisors (see below), whose sum is σ = 773205462948. Its totient is φ = 498670636800.

The previous prime is 623445544307. The next prime is 623445544333. The reversal of 623445544325 is 523445544326.

It can be written as a sum of positive squares in 6 ways, for example, as 21693165796 + 601752378529 = 147286^2 + 775727^2 .

It is not a de Polignac number, because 623445544325 - 2²⁰ = 623444495749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 623445544325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1996532 + ... + 2287581.

It is an arithmetic number, because the mean of its divisors is an integer number (64433788579).

Almost surely, 2^623445544325 is an apocalyptic number.

It is an amenable number.

623445544325 is a deficient number, since it is larger than the sum of its proper divisors (149759918623).

623445544325 is a wasteful number, since it uses less digits than its factorization.

623445544325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4289944 (or 4289939 counting only the distinct ones).

The product of its digits is 6912000, while the sum is 47.

Subtracting from 623445544325 its reverse (523445544326), we obtain a palindrome (99999999999).

The spelling of 623445544325 in words is "six hundred twenty-three billion, four hundred forty-five million, five hundred forty-four thousand, three hundred twenty-five".