40128566679 has 24 divisors (see below), whose sum is σ = 58084704080. Its totient is φ = 26696500992.

The previous prime is 40128566669. The next prime is 40128566833. The reversal of 40128566679 is 97666582104.

It is not a de Polignac number, because 40128566679 - 2⁴ = 40128566663 is a prime.

It is a super-2 number, since 2×40128566679² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40128566629) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11013432 + ... + 11017074.

Almost surely, 2^40128566679 is an apocalyptic number.

40128566679 is a deficient number, since it is larger than the sum of its proper divisors (17956137401).

40128566679 is a wasteful number, since it uses less digits than its factorization.

40128566679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5871 (or 5868 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 40128566679 in words is "forty billion, one hundred twenty-eight million, five hundred sixty-six thousand, six hundred seventy-nine".