621767979327 has 8 divisors (see below), whose sum is σ = 904389788160. Its totient is φ = 376829078360.

The previous prime is 621767979311. The next prime is 621767979331. The reversal of 621767979327 is 723979767126.

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 621767979327 - 2⁴ = 621767979311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621767979397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9420726927 + ... + 9420726992.

It is an arithmetic number, because the mean of its divisors is an integer number (113048723520).

Almost surely, 2^621767979327 is an apocalyptic number.

621767979327 is a deficient number, since it is larger than the sum of its proper divisors (282621808833).

621767979327 is a wasteful number, since it uses less digits than its factorization.

621767979327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18841453933.

The product of its digits is 84015792, while the sum is 66.

The spelling of 621767979327 in words is "six hundred twenty-one billion, seven hundred sixty-seven million, nine hundred seventy-nine thousand, three hundred twenty-seven".