621000401055604 has 24 divisors (see below), whose sum is σ = 1150678440821448. Its totient is φ = 292235171205120.

The previous prime is 621000401055571. The next prime is 621000401055607. The reversal of 621000401055604 is 406550104000126.

It can be written as a sum of positive squares in 4 ways, for example, as 156244500048400 + 464755901007204 = 12499780^2 + 21558198^2 .

It is a super-2 number, since 2×621000401055604² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 621000401055604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621000401055607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67136452 + ... + 75824164.

It is an arithmetic number, because the mean of its divisors is an integer number (47944935034227).

Almost surely, 2^{621000401055604} is an apocalyptic number.

It is an amenable number.

621000401055604 is a deficient number, since it is larger than the sum of its proper divisors (529678039765844).

621000401055604 is a wasteful number, since it uses less digits than its factorization.

621000401055604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9738915 (or 9738913 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 621000401055604 in words is "six hundred twenty-one trillion, four hundred one million, fifty-five thousand, six hundred four".