621869455 has 16 divisors (see below), whose sum is σ = 786714624. Its totient is φ = 471198240.

The previous prime is 621869447. The next prime is 621869467. The reversal of 621869455 is 554968126.

621869455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 621869455 - 2³ = 621869447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35397 + ... + 49966.

It is an arithmetic number, because the mean of its divisors is an integer number (49169664).

Almost surely, 2^621869455 is an apocalyptic number.

621869455 is a deficient number, since it is larger than the sum of its proper divisors (164845169).

621869455 is a wasteful number, since it uses less digits than its factorization.

621869455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85446.

The product of its digits is 518400, while the sum is 46.

The square root of 621869455 is about 24937.3105005331. The cubic root of 621869455 is about 853.5580748415.

The spelling of 621869455 in words is "six hundred twenty-one million, eight hundred sixty-nine thousand, four hundred fifty-five".