621610626431 has 8 divisors (see below), whose sum is σ = 636857000304. Its totient is φ = 606368306880.

The previous prime is 621610626391. The next prime is 621610626433. The reversal of 621610626431 is 134626016126.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621610626431 is a prime.

It is a super-2 number, since 2×621610626431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621610626433) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 702020 + ... + 1317593.

It is an arithmetic number, because the mean of its divisors is an integer number (79607125038).

Almost surely, 2^621610626431 is an apocalyptic number.

621610626431 is a deficient number, since it is larger than the sum of its proper divisors (15246373873).

621610626431 is a wasteful number, since it uses less digits than its factorization.

621610626431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027161.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 621610626431 in words is "six hundred twenty-one billion, six hundred ten million, six hundred twenty-six thousand, four hundred thirty-one".