40099951819 has 2 divisors, whose sum is σ = 40099951820. Its totient is φ = 40099951818.

The previous prime is 40099951769. The next prime is 40099951861. The reversal of 40099951819 is 91815999004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40099951819 - 2⁷ = 40099951691 is a prime.

It is a super-2 number, since 2×40099951819² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40099951819.

It is not a weakly prime, because it can be changed into another prime (40099951889) 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, 20049975909 + 20049975910.

It is an arithmetic number, because the mean of its divisors is an integer number (20049975910).

Almost surely, 2^40099951819 is an apocalyptic number.

40099951819 is a deficient number, since it is larger than the sum of its proper divisors (1).

40099951819 is an equidigital number, since it uses as much as digits as its factorization.

40099951819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1049760, while the sum is 55.

The spelling of 40099951819 in words is "forty billion, ninety-nine million, nine hundred fifty-one thousand, eight hundred nineteen".