40243210457 has 2 divisors, whose sum is σ = 40243210458. Its totient is φ = 40243210456.

The previous prime is 40243210411. The next prime is 40243210463. The reversal of 40243210457 is 75401234204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39969605776 + 273604681 = 199924^2 + 16541^2 .

It is a cyclic number.

It is not a de Polignac number, because 40243210457 - 2²⁴ = 40226433241 is a prime.

It is not a weakly prime, because it can be changed into another prime (40243210157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20121605228 + 20121605229.

It is an arithmetic number, because the mean of its divisors is an integer number (20121605229).

Almost surely, 2^40243210457 is an apocalyptic number.

It is an amenable number.

40243210457 is a deficient number, since it is larger than the sum of its proper divisors (1).

40243210457 is an equidigital number, since it uses as much as digits as its factorization.

40243210457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 32.

The spelling of 40243210457 in words is "forty billion, two hundred forty-three million, two hundred ten thousand, four hundred fifty-seven".