40178743081 has 4 divisors (see below), whose sum is σ = 40202090964. Its totient is φ = 40155395200.

The previous prime is 40178743069. The next prime is 40178743127. The reversal of 40178743081 is 18034787104.

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 36169953856 + 4008789225 = 190184^2 + 63315^2 .

It is a cyclic number.

It is not a de Polignac number, because 40178743081 - 2⁵ = 40178743049 is a prime.

It is a super-2 number, since 2×40178743081² (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 (40178743021) 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, 11671360 + ... + 11674801.

It is an arithmetic number, because the mean of its divisors is an integer number (10050522741).

Almost surely, 2^40178743081 is an apocalyptic number.

It is an amenable number.

40178743081 is a deficient number, since it is larger than the sum of its proper divisors (23347883).

40178743081 is a wasteful number, since it uses less digits than its factorization.

40178743081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23347882.

The product of its (nonzero) digits is 150528, while the sum is 43.

The spelling of 40178743081 in words is "forty billion, one hundred seventy-eight million, seven hundred forty-three thousand, eighty-one".