2457043681 has 2 divisors, whose sum is σ = 2457043682. Its totient is φ = 2457043680.

The previous prime is 2457043661. The next prime is 2457043697. The reversal of 2457043681 is 1863407542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2173424400 + 283619281 = 46620^2 + 16841^2 .

It is a cyclic number.

It is not a de Polignac number, because 2457043681 - 2⁵ = 2457043649 is a prime.

It is a super-2 number, since 2×2457043681² = 12074127300684059522, which contains 22 as substring.

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, 1228521840 + 1228521841.

It is an arithmetic number, because the mean of its divisors is an integer number (1228521841).

Almost surely, 2^2457043681 is an apocalyptic number.

It is an amenable number.

2457043681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2457043681 is an equidigital number, since it uses as much as digits as its factorization.

2457043681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 2457043681 is about 49568.5755393475. The cubic root of 2457043681 is about 1349.3904300587.

The spelling of 2457043681 in words is "two billion, four hundred fifty-seven million, forty-three thousand, six hundred eighty-one".