40021942859 has 2 divisors, whose sum is σ = 40021942860. Its totient is φ = 40021942858.

The previous prime is 40021942823. The next prime is 40021942871. The reversal of 40021942859 is 95824912004.

40021942859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40021942859 is a prime.

It is a super-2 number, since 2×40021942859² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40021942819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20010971429 + 20010971430.

It is an arithmetic number, because the mean of its divisors is an integer number (20010971430).

Almost surely, 2^40021942859 is an apocalyptic number.

40021942859 is a deficient number, since it is larger than the sum of its proper divisors (1).

40021942859 is an equidigital number, since it uses as much as digits as its factorization.

40021942859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 40021942859 in words is "forty billion, twenty-one million, nine hundred forty-two thousand, eight hundred fifty-nine".