40055365657 has 2 divisors, whose sum is σ = 40055365658. Its totient is φ = 40055365656.

The previous prime is 40055365627. The next prime is 40055365673. The reversal of 40055365657 is 75656355004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31132485136 + 8922880521 = 176444^2 + 94461^2 .

It is a cyclic number.

It is not a de Polignac number, because 40055365657 - 2¹⁹ = 40054841369 is a prime.

It is not a weakly prime, because it can be changed into another prime (40055365627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20027682828 + 20027682829.

It is an arithmetic number, because the mean of its divisors is an integer number (20027682829).

Almost surely, 2^40055365657 is an apocalyptic number.

It is an amenable number.

40055365657 is a deficient number, since it is larger than the sum of its proper divisors (1).

40055365657 is an equidigital number, since it uses as much as digits as its factorization.

40055365657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890000, while the sum is 46.

The spelling of 40055365657 in words is "forty billion, fifty-five million, three hundred sixty-five thousand, six hundred fifty-seven".