623405402255552 has 224 divisors, whose sum is σ = 1435812018001920. Its totient is φ = 263033249955840.

The previous prime is 623405402255539. The next prime is 623405402255591. The reversal of 623405402255552 is 255552204504326.

623405402255552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (224).

It is a super-2 number, since 2×623405402255552² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 623405402255552.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23684702552 + ... + 23684728872.

Almost surely, 2^{623405402255552} 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 623405402255552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (717906009000960).

623405402255552 is an abundant number, since it is smaller than the sum of its proper divisors (812406615746368).

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

623405402255552 is a wasteful number, since it uses less digits than its factorization.

623405402255552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28319 (or 28309 counting only the distinct ones).

The product of its (nonzero) digits is 14400000, while the sum is 50.

Adding to 623405402255552 its reverse (255552204504326), we get a palindrome (878957606759878).

The spelling of 623405402255552 in words is "six hundred twenty-three trillion, four hundred five billion, four hundred two million, two hundred fifty-five thousand, five hundred fifty-two".