40369408697 has 2 divisors, whose sum is σ = 40369408698. Its totient is φ = 40369408696.

The previous prime is 40369408693. The next prime is 40369408759. The reversal of 40369408697 is 79680496304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36908557456 + 3460851241 = 192116^2 + 58829^2 .

It is a cyclic number.

It is not a de Polignac number, because 40369408697 - 2² = 40369408693 is a prime.

It is not a weakly prime, because it can be changed into another prime (40369408693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20184704348 + 20184704349.

It is an arithmetic number, because the mean of its divisors is an integer number (20184704349).

Almost surely, 2^40369408697 is an apocalyptic number.

It is an amenable number.

40369408697 is a deficient number, since it is larger than the sum of its proper divisors (1).

40369408697 is an equidigital number, since it uses as much as digits as its factorization.

40369408697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7838208, while the sum is 56.

The spelling of 40369408697 in words is "forty billion, three hundred sixty-nine million, four hundred eight thousand, six hundred ninety-seven".