621132256255 has 24 divisors (see below), whose sum is σ = 873668671920. Its totient is φ = 422667947520.

The previous prime is 621132256247. The next prime is 621132256267. The reversal of 621132256255 is 552652231126.

It is not a de Polignac number, because 621132256255 - 2³ = 621132256247 is a prime.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 9644370 + ... + 9708559.

It is an arithmetic number, because the mean of its divisors is an integer number (36402861330).

Almost surely, 2^621132256255 is an apocalyptic number.

621132256255 is a deficient number, since it is larger than the sum of its proper divisors (252536415665).

621132256255 is a wasteful number, since it uses less digits than its factorization.

621132256255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19353079 (or 19353072 counting only the distinct ones).

The product of its digits is 216000, while the sum is 40.

The spelling of 621132256255 in words is "six hundred twenty-one billion, one hundred thirty-two million, two hundred fifty-six thousand, two hundred fifty-five".