621090550081 has 8 divisors (see below), whose sum is σ = 621640575360. Its totient is φ = 620540698032.

The previous prime is 621090550049. The next prime is 621090550141. The reversal of 621090550081 is 180055090126.

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 621090550081 - 2⁵ = 621090550049 is a prime.

It is a super-2 number, since 2×621090550081² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 621090550081.

It is not an unprimeable number, because it can be changed into a prime (621090550001) 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, 7740936 + ... + 7820758.

It is an arithmetic number, because the mean of its divisors is an integer number (77705071920).

Almost surely, 2^621090550081 is an apocalyptic number.

It is an amenable number.

621090550081 is a deficient number, since it is larger than the sum of its proper divisors (550025279).

621090550081 is a wasteful number, since it uses less digits than its factorization.

621090550081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86615.

The product of its (nonzero) digits is 21600, while the sum is 37.

The spelling of 621090550081 in words is "six hundred twenty-one billion, ninety million, five hundred fifty thousand, eighty-one".