40164200081 has 4 divisors (see below), whose sum is σ = 40165377600. Its totient is φ = 40163022564.

The previous prime is 40164199993. The next prime is 40164200099. The reversal of 40164200081 is 18000246104.

40164200081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40164200081 - 2²⁶ = 40097091217 is a prime.

It is a super-2 number, since 2×40164200081² (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 40164200081.

It is not an unprimeable number, because it can be changed into a prime (40164203081) 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, 536021 + ... + 606338.

It is an arithmetic number, because the mean of its divisors is an integer number (10041344400).

Almost surely, 2^40164200081 is an apocalyptic number.

It is an amenable number.

40164200081 is a deficient number, since it is larger than the sum of its proper divisors (1177519).

40164200081 is a wasteful number, since it uses less digits than its factorization.

40164200081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177518.

The product of its (nonzero) digits is 1536, while the sum is 26.

Adding to 40164200081 its reverse (18000246104), we get a palindrome (58164446185).

The spelling of 40164200081 in words is "forty billion, one hundred sixty-four million, two hundred thousand, eighty-one".