623656841024 has 112 divisors (see below), whose sum is σ = 1476200630016. Its totient is φ = 255841996800.

The previous prime is 623656841023. The next prime is 623656841029. The reversal of 623656841024 is 420148656326.

It is a tau number, because it is divible by the number of its divisors (112).

It is a self number, because there is not a number n which added to its sum of digits gives 623656841024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623656841023) 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, 653189 + ... + 1293819.

It is an arithmetic number, because the mean of its divisors is an integer number (13180362768).

Almost surely, 2^623656841024 is an apocalyptic number.

623656841024 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 623656841024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (738100315008).

623656841024 is an abundant number, since it is smaller than the sum of its proper divisors (852543788992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

623656841024 is a wasteful number, since it uses less digits than its factorization.

623656841024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640744 (or 640734 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 47.

The spelling of 623656841024 in words is "six hundred twenty-three billion, six hundred fifty-six million, eight hundred forty-one thousand, twenty-four".