40139252909 has 8 divisors (see below), whose sum is σ = 46558110528. Its totient is φ = 33891564960.

The previous prime is 40139252903. The next prime is 40139252947. The reversal of 40139252909 is 90925293104.

It is a happy number.

40139252909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40139252909 - 2²⁰ = 40138204333 is a prime.

It is a super-2 number, since 2×40139252909² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40139252909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40139252903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42791912 + ... + 42792849.

It is an arithmetic number, because the mean of its divisors is an integer number (5819763816).

Almost surely, 2^40139252909 is an apocalyptic number.

It is an amenable number.

40139252909 is a deficient number, since it is larger than the sum of its proper divisors (6418857619).

40139252909 is an equidigital number, since it uses as much as digits as its factorization.

40139252909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85584835.

The product of its (nonzero) digits is 174960, while the sum is 44.

The spelling of 40139252909 in words is "forty billion, one hundred thirty-nine million, two hundred fifty-two thousand, nine hundred nine".