2045421641 has 2 divisors, whose sum is σ = 2045421642. Its totient is φ = 2045421640.

The previous prime is 2045421629. The next prime is 2045421659. The reversal of 2045421641 is 1461245402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1716362041 + 329059600 = 41429^2 + 18140^2 .

It is a cyclic number.

It is not a de Polignac number, because 2045421641 - 2¹⁰ = 2045420617 is a prime.

It is a super-2 number, since 2×2045421641² = 8367499378942265762, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2045421661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1022710820 + 1022710821.

It is an arithmetic number, because the mean of its divisors is an integer number (1022710821).

Almost surely, 2^2045421641 is an apocalyptic number.

It is an amenable number.

2045421641 is a deficient number, since it is larger than the sum of its proper divisors (1).

2045421641 is an equidigital number, since it uses as much as digits as its factorization.

2045421641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 2045421641 is about 45226.3379127694. The cubic root of 2045421641 is about 1269.3876894141.

The spelling of 2045421641 in words is "two billion, forty-five million, four hundred twenty-one thousand, six hundred forty-one".