623635406000 has 80 divisors (see below), whose sum is σ = 1508454443808. Its totient is φ = 249370784000.

The previous prime is 623635405997. The next prime is 623635406021. The reversal of 623635406000 is 604536326.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×623635406000² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6115430 + ... + 6216570.

Almost surely, 2^623635406000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 623635406000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (754227221904).

623635406000 is an abundant number, since it is smaller than the sum of its proper divisors (884819037808).

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

623635406000 is a wasteful number, since it uses less digits than its factorization.

623635406000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104247 (or 104231 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 35.

The spelling of 623635406000 in words is "six hundred twenty-three billion, six hundred thirty-five million, four hundred six thousand".