621055505 has 8 divisors (see below), whose sum is σ = 851733312. Its totient is φ = 425866608.

The previous prime is 621055483. The next prime is 621055511. The reversal of 621055505 is 505550126.

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 621055505 - 2¹⁸ = 620793361 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8872187 + ... + 8872256.

It is an arithmetic number, because the mean of its divisors is an integer number (106466664).

Almost surely, 2^621055505 is an apocalyptic number.

It is an amenable number.

621055505 is a deficient number, since it is larger than the sum of its proper divisors (230677807).

621055505 is a wasteful number, since it uses less digits than its factorization.

621055505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17744455.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 621055505 is about 24920.9852333330. The cubic root of 621055505 is about 853.1855116904.

The spelling of 621055505 in words is "six hundred twenty-one million, fifty-five thousand, five hundred five".