621622745 has 8 divisors (see below), whose sum is σ = 746501184. Its totient is φ = 496928944.

The previous prime is 621622741. The next prime is 621622747. The reversal of 621622745 is 547226126.

621622745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 621622745 - 2² = 621622741 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (621622741) 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, 38639 + ... + 52308.

It is an arithmetic number, because the mean of its divisors is an integer number (93312648).

Almost surely, 2^621622745 is an apocalyptic number.

It is an amenable number.

621622745 is a deficient number, since it is larger than the sum of its proper divisors (124878439).

621622745 is a wasteful number, since it uses less digits than its factorization.

621622745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92319.

The product of its digits is 40320, while the sum is 35.

The square root of 621622745 is about 24932.3634058226. The cubic root of 621622745 is about 853.4451844995.

The spelling of 621622745 in words is "six hundred twenty-one million, six hundred twenty-two thousand, seven hundred forty-five".