624844400081 has 16 divisors (see below), whose sum is σ = 694819867968. Its totient is φ = 557117851200.

The previous prime is 624844400053. The next prime is 624844400149. The reversal of 624844400081 is 180004448426.

624844400081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 624844400081 - 2¹⁸ = 624844137937 is a prime.

It is a super-2 number, since 2×624844400081² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (624844400051) 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, 1108970 + ... + 1574643.

It is an arithmetic number, because the mean of its divisors is an integer number (43426241748).

Almost surely, 2^624844400081 is an apocalyptic number.

624844400081 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

624844400081 is a deficient number, since it is larger than the sum of its proper divisors (69975467887).

624844400081 is a wasteful number, since it uses less digits than its factorization.

624844400081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684032.

The product of its (nonzero) digits is 196608, while the sum is 41.

The spelling of 624844400081 in words is "six hundred twenty-four billion, eight hundred forty-four million, four hundred thousand, eighty-one".