621556250113 has 8 divisors (see below), whose sum is σ = 622145413800. Its totient is φ = 620967287808.

The previous prime is 621556250083. The next prime is 621556250129. The reversal of 621556250113 is 311052655126.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 112192842304 + 509363407809 = 334952^2 + 713697^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 621556250113 - 2²⁵ = 621522695681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621556250143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6528033 + ... + 6622561.

It is an arithmetic number, because the mean of its divisors is an integer number (77768176725).

Almost surely, 2^621556250113 is an apocalyptic number.

It is an amenable number.

621556250113 is a deficient number, since it is larger than the sum of its proper divisors (589163687).

621556250113 is a wasteful number, since it uses less digits than its factorization.

621556250113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100691.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 621556250113 in words is "six hundred twenty-one billion, five hundred fifty-six million, two hundred fifty thousand, one hundred thirteen".