621448104438 has 24 divisors (see below), whose sum is σ = 1538823877968. Its totient is φ = 177556601232.

The previous prime is 621448104437. The next prime is 621448104451. The reversal of 621448104438 is 834401844126.

621448104438 is a `hidden beast` number, since 62 + 1 + 448 + 104 + 43 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 621448104393 and 621448104402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621448104437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2466063781 + ... + 2466064032.

It is an arithmetic number, because the mean of its divisors is an integer number (64117661582).

Almost surely, 2^621448104438 is an apocalyptic number.

621448104438 is an abundant number, since it is smaller than the sum of its proper divisors (917375773530).

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

621448104438 is a wasteful number, since it uses less digits than its factorization.

621448104438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4932127828 (or 4932127825 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 45.

The spelling of 621448104438 in words is "six hundred twenty-one billion, four hundred forty-eight million, one hundred four thousand, four hundred thirty-eight".