621867942617 has 8 divisors (see below), whose sum is σ = 628840072512. Its totient is φ = 614917299600.

The previous prime is 621867942569. The next prime is 621867942637. The reversal of 621867942617 is 716249768126.

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 621867942617 - 2²⁸ = 621599507161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621867942637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5313509 + ... + 5429282.

It is an arithmetic number, because the mean of its divisors is an integer number (78605009064).

Almost surely, 2^621867942617 is an apocalyptic number.

It is an amenable number.

621867942617 is a deficient number, since it is larger than the sum of its proper divisors (6972129895).

621867942617 is a wasteful number, since it uses less digits than its factorization.

621867942617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10743439.

The product of its digits is 12192768, while the sum is 59.

The spelling of 621867942617 in words is "six hundred twenty-one billion, eight hundred sixty-seven million, nine hundred forty-two thousand, six hundred seventeen".