621334624747 has 4 divisors (see below), whose sum is σ = 621336989520. Its totient is φ = 621332259976.

The previous prime is 621334624739. The next prime is 621334624759. The reversal of 621334624747 is 747426433126.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 621334624747 - 2³ = 621334624739 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 621334624747.

It is not an unprimeable number, because it can be changed into a prime (621334664747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 730768 + ... + 1332925.

It is an arithmetic number, because the mean of its divisors is an integer number (155334247380).

Almost surely, 2^621334624747 is an apocalyptic number.

621334624747 is a deficient number, since it is larger than the sum of its proper divisors (2364773).

621334624747 is a wasteful number, since it uses less digits than its factorization.

621334624747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2364772.

The product of its digits is 4064256, while the sum is 49.

The spelling of 621334624747 in words is "six hundred twenty-one billion, three hundred thirty-four million, six hundred twenty-four thousand, seven hundred forty-seven".