40557610693 has 2 divisors, whose sum is σ = 40557610694. Its totient is φ = 40557610692.

The previous prime is 40557610679. The next prime is 40557610727. The reversal of 40557610693 is 39601675504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31468276449 + 9089334244 = 177393^2 + 95338^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40557610693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40557610603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20278805346 + 20278805347.

It is an arithmetic number, because the mean of its divisors is an integer number (20278805347).

Almost surely, 2^40557610693 is an apocalyptic number.

It is an amenable number.

40557610693 is a deficient number, since it is larger than the sum of its proper divisors (1).

40557610693 is an equidigital number, since it uses as much as digits as its factorization.

40557610693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 40557610693 in words is "forty billion, five hundred fifty-seven million, six hundred ten thousand, six hundred ninety-three".