621662746339 has 8 divisors (see below), whose sum is σ = 642531100688. Its totient is φ = 601008426720.

The previous prime is 621662746319. The next prime is 621662746361. The reversal of 621662746339 is 933647266126.

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 621662746339 - 2⁹ = 621662745827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 621662746339.

It is not an unprimeable number, because it can be changed into a prime (621662746319) 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, 53502777 + ... + 53514394.

It is an arithmetic number, because the mean of its divisors is an integer number (80316387586).

Almost surely, 2^621662746339 is an apocalyptic number.

621662746339 is a deficient number, since it is larger than the sum of its proper divisors (20868354349).

621662746339 is a wasteful number, since it uses less digits than its factorization.

621662746339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107017365.

The product of its digits is 11757312, while the sum is 55.

The spelling of 621662746339 in words is "six hundred twenty-one billion, six hundred sixty-two million, seven hundred forty-six thousand, three hundred thirty-nine".