40440111381081 has 16 divisors (see below), whose sum is σ = 60013339646400. Its totient is φ = 26914145667264.

The previous prime is 40440111381077. The next prime is 40440111381191. The reversal of 40440111381081 is 18018311104404.

It is a happy number.

40440111381081 is a `hidden beast` number, since 4 + 0 + 440 + 1 + 1 + 138 + 1 + 0 + 81 = 666.

It is not a de Polignac number, because 40440111381081 - 2² = 40440111381077 is a prime.

It is a super-2 number, since 2×40440111381081² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40440111381071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1275777936 + ... + 1275809633.

It is an arithmetic number, because the mean of its divisors is an integer number (3750833727900).

Almost surely, 2^{40440111381081} is an apocalyptic number.

It is an amenable number.

40440111381081 is a deficient number, since it is larger than the sum of its proper divisors (19573228265319).

40440111381081 is a wasteful number, since it uses less digits than its factorization.

40440111381081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2551588165 (or 2551588159 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

Adding to 40440111381081 its reverse (18018311104404), we get a palindrome (58458422485485).

The spelling of 40440111381081 in words is "forty trillion, four hundred forty billion, one hundred eleven million, three hundred eighty-one thousand, eighty-one".