621264355 has 4 divisors (see below), whose sum is σ = 745517232. Its totient is φ = 497011480.

The previous prime is 621264353. The next prime is 621264359. The reversal of 621264355 is 553462126.

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

It is not a de Polignac number, because 621264355 - 2¹ = 621264353 is a prime.

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 621264355.

It is not an unprimeable number, because it can be changed into a prime (621264353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62126431 + ... + 62126440.

It is an arithmetic number, because the mean of its divisors is an integer number (186379308).

Almost surely, 2^621264355 is an apocalyptic number.

621264355 is a deficient number, since it is larger than the sum of its proper divisors (124252877).

621264355 is a wasteful number, since it uses less digits than its factorization.

621264355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124252876.

The product of its digits is 43200, while the sum is 34.

The square root of 621264355 is about 24925.1751247609. The cubic root of 621264355 is about 853.2811380462.

The spelling of 621264355 in words is "six hundred twenty-one million, two hundred sixty-four thousand, three hundred fifty-five".