40687166091 has 24 divisors (see below), whose sum is σ = 64216581520. Its totient is φ = 22762048320.

The previous prime is 40687166057. The next prime is 40687166119. The reversal of 40687166091 is 19066178604.

It is a happy number.

It is not a de Polignac number, because 40687166091 - 2¹⁵ = 40687133323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40687166091.

It is not an unprimeable number, because it can be changed into a prime (40687166011) 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 23 ways as a sum of consecutive naturals, for example, 4306276 + ... + 4315713.

Almost surely, 2^40687166091 is an apocalyptic number.

40687166091 is a deficient number, since it is larger than the sum of its proper divisors (23529415429).

40687166091 is a wasteful number, since it uses less digits than its factorization.

40687166091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8622027 (or 8622016 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 40687166091 in words is "forty billion, six hundred eighty-seven million, one hundred sixty-six thousand, ninety-one".