621142636355 has 8 divisors (see below), whose sum is σ = 745376987472. Its totient is φ = 496910226528.

The previous prime is 621142636351. The next prime is 621142636379. The reversal of 621142636355 is 553636241126.

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 621142636355 - 2² = 621142636351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621142636351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348992 + ... + 1167938.

It is an arithmetic number, because the mean of its divisors is an integer number (93172123434).

Almost surely, 2^621142636355 is an apocalyptic number.

621142636355 is a deficient number, since it is larger than the sum of its proper divisors (124234351117).

621142636355 is a wasteful number, since it uses less digits than its factorization.

621142636355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970645.

The product of its digits is 777600, while the sum is 44.

The spelling of 621142636355 in words is "six hundred twenty-one billion, one hundred forty-two million, six hundred thirty-six thousand, three hundred fifty-five".