40164465457 has 2 divisors, whose sum is σ = 40164465458. Its totient is φ = 40164465456.

The previous prime is 40164465437. The next prime is 40164465493. The reversal of 40164465457 is 75456446104.

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., 27489308401 + 12675157056 = 165799^2 + 112584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40164465457 is a prime.

It is a super-2 number, since 2×40164465457² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40164465437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20082232728 + 20082232729.

It is an arithmetic number, because the mean of its divisors is an integer number (20082232729).

Almost surely, 2^40164465457 is an apocalyptic number.

It is an amenable number.

40164465457 is a deficient number, since it is larger than the sum of its proper divisors (1).

40164465457 is an equidigital number, since it uses as much as digits as its factorization.

40164465457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1612800, while the sum is 46.

The spelling of 40164465457 in words is "forty billion, one hundred sixty-four million, four hundred sixty-five thousand, four hundred fifty-seven".