40191662768 has 20 divisors (see below), whose sum is σ = 81969839160. Its totient is φ = 19038155904.

The previous prime is 40191662699. The next prime is 40191662873. The reversal of 40191662768 is 86726619104.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 66104405 + ... + 66105012.

It is an arithmetic number, because the mean of its divisors is an integer number (4098491958).

Almost surely, 2^40191662768 is an apocalyptic number.

It is an amenable number.

40191662768 is an abundant number, since it is smaller than the sum of its proper divisors (41778176392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40191662768 is a wasteful number, since it uses less digits than its factorization.

40191662768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132209444 (or 132209438 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 40191662768 in words is "forty billion, one hundred ninety-one million, six hundred sixty-two thousand, seven hundred sixty-eight".