40412961857 has 2 divisors, whose sum is σ = 40412961858. Its totient is φ = 40412961856.

The previous prime is 40412961839. The next prime is 40412961893. The reversal of 40412961857 is 75816921404.

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., 40214687296 + 198274561 = 200536^2 + 14081^2 .

It is a cyclic number.

It is not a de Polignac number, because 40412961857 - 2⁶ = 40412961793 is a prime.

It is not a weakly prime, because it can be changed into another prime (40412961817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20206480928 + 20206480929.

It is an arithmetic number, because the mean of its divisors is an integer number (20206480929).

Almost surely, 2^40412961857 is an apocalyptic number.

It is an amenable number.

40412961857 is a deficient number, since it is larger than the sum of its proper divisors (1).

40412961857 is an equidigital number, since it uses as much as digits as its factorization.

40412961857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 40412961857 in words is "forty billion, four hundred twelve million, nine hundred sixty-one thousand, eight hundred fifty-seven".