40138483817 has 4 divisors (see below), whose sum is σ = 40176032580. Its totient is φ = 40100935056.

The previous prime is 40138483783. The next prime is 40138483837. The reversal of 40138483817 is 71838483104.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18436479961 + 21702003856 = 135781^2 + 147316^2 .

It is a cyclic number.

It is not a de Polignac number, because 40138483817 - 2¹⁰ = 40138482793 is a prime.

It is a super-2 number, since 2×40138483817² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40138483837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18772778 + ... + 18774915.

It is an arithmetic number, because the mean of its divisors is an integer number (10044008145).

Almost surely, 2^40138483817 is an apocalyptic number.

It is an amenable number.

40138483817 is a deficient number, since it is larger than the sum of its proper divisors (37548763).

40138483817 is a wasteful number, since it uses less digits than its factorization.

40138483817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37548762.

The product of its (nonzero) digits is 516096, while the sum is 47.

The spelling of 40138483817 in words is "forty billion, one hundred thirty-eight million, four hundred eighty-three thousand, eight hundred seventeen".