40320421044457 has 2 divisors, whose sum is σ = 40320421044458. Its totient is φ = 40320421044456.

The previous prime is 40320421044427. The next prime is 40320421044479. The reversal of 40320421044457 is 75444012402304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39880475379801 + 439945664656 = 6315099^2 + 663284^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40320421044457 is a prime.

It is not a weakly prime, because it can be changed into another prime (40320421044427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20160210522228 + 20160210522229.

It is an arithmetic number, because the mean of its divisors is an integer number (20160210522229).

Almost surely, 2^{40320421044457} is an apocalyptic number.

It is an amenable number.

40320421044457 is a deficient number, since it is larger than the sum of its proper divisors (1).

40320421044457 is an equidigital number, since it uses as much as digits as its factorization.

40320421044457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 430080, while the sum is 40.

The spelling of 40320421044457 in words is "forty trillion, three hundred twenty billion, four hundred twenty-one million, forty-four thousand, four hundred fifty-seven".