2044764512621 has 2 divisors, whose sum is σ = 2044764512622. Its totient is φ = 2044764512620.

The previous prime is 2044764512591. The next prime is 2044764512653. The reversal of 2044764512621 is 1262154674402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1368406304521 + 676358208100 = 1169789^2 + 822410^2 .

It is a cyclic number.

It is not a de Polignac number, because 2044764512621 - 2¹⁰ = 2044764511597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2044764512671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1022382256310 + 1022382256311.

It is an arithmetic number, because the mean of its divisors is an integer number (1022382256311).

Almost surely, 2^{2044764512621} is an apocalyptic number.

It is an amenable number.

2044764512621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2044764512621 is an equidigital number, since it uses as much as digits as its factorization.

2044764512621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 44.

The spelling of 2044764512621 in words is "two trillion, forty-four billion, seven hundred sixty-four million, five hundred twelve thousand, six hundred twenty-one".