2457043661 has 2 divisors, whose sum is σ = 2457043662. Its totient is φ = 2457043660.

The previous prime is 2457043657. The next prime is 2457043681. The reversal of 2457043661 is 1663407542.

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., 1626508900 + 830534761 = 40330^2 + 28819^2 .

It is a cyclic number.

It is not a de Polignac number, because 2457043661 - 2² = 2457043657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2457043621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1228521830 + 1228521831.

It is an arithmetic number, because the mean of its divisors is an integer number (1228521831).

Almost surely, 2^2457043661 is an apocalyptic number.

It is an amenable number.

2457043661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2457043661 is an equidigital number, since it uses as much as digits as its factorization.

2457043661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 2457043661 is about 49568.5753376068. The cubic root of 2457043661 is about 1349.3904263974.

The spelling of 2457043661 in words is "two billion, four hundred fifty-seven million, forty-three thousand, six hundred sixty-one".