40354399997 has 2 divisors, whose sum is σ = 40354399998. Its totient is φ = 40354399996.

The previous prime is 40354399993. The next prime is 40354400069. The reversal of 40354399997 is 79999345304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40178598916 + 175801081 = 200446^2 + 13259^2 .

It is a cyclic number.

It is not a de Polignac number, because 40354399997 - 2² = 40354399993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40354399993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20177199998 + 20177199999.

It is an arithmetic number, because the mean of its divisors is an integer number (20177199999).

Almost surely, 2^40354399997 is an apocalyptic number.

It is an amenable number.

40354399997 is a deficient number, since it is larger than the sum of its proper divisors (1).

40354399997 is an equidigital number, since it uses as much as digits as its factorization.

40354399997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33067440, while the sum is 62.

The spelling of 40354399997 in words is "forty billion, three hundred fifty-four million, three hundred ninety-nine thousand, nine hundred ninety-seven".