40369783693 has 2 divisors, whose sum is σ = 40369783694. Its totient is φ = 40369783692.

The previous prime is 40369783681. The next prime is 40369783763. The reversal of 40369783693 is 39638796304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22649648004 + 17720135689 = 150498^2 + 133117^2 .

It is a cyclic number.

It is not a de Polignac number, because 40369783693 - 2⁵ = 40369783661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40369781693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20184891846 + 20184891847.

It is an arithmetic number, because the mean of its divisors is an integer number (20184891847).

Almost surely, 2^40369783693 is an apocalyptic number.

It is an amenable number.

40369783693 is a deficient number, since it is larger than the sum of its proper divisors (1).

40369783693 is an equidigital number, since it uses as much as digits as its factorization.

40369783693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17635968, while the sum is 58.

The spelling of 40369783693 in words is "forty billion, three hundred sixty-nine million, seven hundred eighty-three thousand, six hundred ninety-three".