40406126639 has 16 divisors (see below), whose sum is σ = 41267143680. Its totient is φ = 39553367040.

The previous prime is 40406126627. The next prime is 40406126641. The reversal of 40406126639 is 93662160404.

It is a cyclic number.

It is not a de Polignac number, because 40406126639 - 2¹² = 40406122543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40406126596 and 40406126605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40406126669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9575072 + ... + 9579290.

It is an arithmetic number, because the mean of its divisors is an integer number (2579196480).

Almost surely, 2^40406126639 is an apocalyptic number.

40406126639 is a deficient number, since it is larger than the sum of its proper divisors (861017041).

40406126639 is a wasteful number, since it uses less digits than its factorization.

40406126639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5150.

The product of its (nonzero) digits is 186624, while the sum is 41.

The spelling of 40406126639 in words is "forty billion, four hundred six million, one hundred twenty-six thousand, six hundred thirty-nine".