40138166481 has 16 divisors (see below), whose sum is σ = 62000770944. Its totient is φ = 22621901184.

The previous prime is 40138166473. The next prime is 40138166527. The reversal of 40138166481 is 18466183104.

It is not a de Polignac number, because 40138166481 - 2³ = 40138166473 is a prime.

It is a super-2 number, since 2×40138166481² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40138166401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13089846 + ... + 13092911.

It is an arithmetic number, because the mean of its divisors is an integer number (3875048184).

Almost surely, 2^40138166481 is an apocalyptic number.

It is an amenable number.

40138166481 is a deficient number, since it is larger than the sum of its proper divisors (21862604463).

40138166481 is a wasteful number, since it uses less digits than its factorization.

40138166481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26182840.

The product of its (nonzero) digits is 110592, while the sum is 42.

The spelling of 40138166481 in words is "forty billion, one hundred thirty-eight million, one hundred sixty-six thousand, four hundred eighty-one".