40688410191 has 32 divisors (see below), whose sum is σ = 65791703040. Its totient is φ = 22028457600.

The previous prime is 40688410177. The next prime is 40688410201. The reversal of 40688410191 is 19101488604.

It is a happy number.

It is not a de Polignac number, because 40688410191 - 2¹⁸ = 40688148047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40688410121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1516456 + ... + 1543053.

It is an arithmetic number, because the mean of its divisors is an integer number (2055990720).

Almost surely, 2^40688410191 is an apocalyptic number.

40688410191 is a deficient number, since it is larger than the sum of its proper divisors (25103292849).

40688410191 is a wasteful number, since it uses less digits than its factorization.

40688410191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3059567.

The product of its (nonzero) digits is 55296, while the sum is 42.

Adding to 40688410191 its reverse (19101488604), we get a palindrome (59789898795).

The spelling of 40688410191 in words is "forty billion, six hundred eighty-eight million, four hundred ten thousand, one hundred ninety-one".