40502291993 has 2 divisors, whose sum is σ = 40502291994. Its totient is φ = 40502291992.

The previous prime is 40502291917. The next prime is 40502292013. The reversal of 40502291993 is 39919220504.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24288599104 + 16213692889 = 155848^2 + 127333^2 .

It is a cyclic number.

It is not a de Polignac number, because 40502291993 - 2¹⁸ = 40502029849 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40502296993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20251145996 + 20251145997.

It is an arithmetic number, because the mean of its divisors is an integer number (20251145997).

Almost surely, 2^40502291993 is an apocalyptic number.

It is an amenable number.

40502291993 is a deficient number, since it is larger than the sum of its proper divisors (1).

40502291993 is an equidigital number, since it uses as much as digits as its factorization.

40502291993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 44.

The spelling of 40502291993 in words is "forty billion, five hundred two million, two hundred ninety-one thousand, nine hundred ninety-three".