40021326139 has 2 divisors, whose sum is σ = 40021326140. Its totient is φ = 40021326138.

The previous prime is 40021326113. The next prime is 40021326173. The reversal of 40021326139 is 93162312004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40021326139 - 2⁷ = 40021326011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40021326139.

It is not a weakly prime, because it can be changed into another prime (40021326109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20010663069 + 20010663070.

It is an arithmetic number, because the mean of its divisors is an integer number (20010663070).

Almost surely, 2^40021326139 is an apocalyptic number.

40021326139 is a deficient number, since it is larger than the sum of its proper divisors (1).

40021326139 is an equidigital number, since it uses as much as digits as its factorization.

40021326139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 40021326139 in words is "forty billion, twenty-one million, three hundred twenty-six thousand, one hundred thirty-nine".