4545400621 has 2 divisors, whose sum is σ = 4545400622. Its totient is φ = 4545400620.

The previous prime is 4545400603. The next prime is 4545400631. The reversal of 4545400621 is 1260045454.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3750950025 + 794450596 = 61245^2 + 28186^2 .

It is a cyclic number.

It is not a de Polignac number, because 4545400621 - 2⁷ = 4545400493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4545400631) 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 as a sum of consecutive naturals, namely, 2272700310 + 2272700311.

It is an arithmetic number, because the mean of its divisors is an integer number (2272700311).

Almost surely, 2^4545400621 is an apocalyptic number.

It is an amenable number.

4545400621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4545400621 is an equidigital number, since it uses as much as digits as its factorization.

4545400621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 4545400621 is about 67419.5863306799. The cubic root of 4545400621 is about 1656.4972617558.

The spelling of 4545400621 in words is "four billion, five hundred forty-five million, four hundred thousand, six hundred twenty-one".