621352431655055 has 16 divisors (see below), whose sum is σ = 746330577108480. Its totient is φ = 496610180386848.

The previous prime is 621352431655001. The next prime is 621352431655079. The reversal of 621352431655055 is 550556134253126.

621352431655055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 621352431655055 - 2²⁶ = 621352364546191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 621352431654988 and 621352431655006.

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, 743379356 + ... + 744214734.

It is an arithmetic number, because the mean of its divisors is an integer number (46645661069280).

Almost surely, 2^{621352431655055} is an apocalyptic number.

621352431655055 is a deficient number, since it is larger than the sum of its proper divisors (124978145453425).

621352431655055 is a wasteful number, since it uses less digits than its factorization.

621352431655055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976390.

The product of its (nonzero) digits is 16200000, while the sum is 53.

The spelling of 621352431655055 in words is "six hundred twenty-one trillion, three hundred fifty-two billion, four hundred thirty-one million, six hundred fifty-five thousand, fifty-five".