40688623838 has 16 divisors (see below), whose sum is σ = 62655774720. Its totient is φ = 19806448536.

The previous prime is 40688623771. The next prime is 40688623841. The reversal of 40688623838 is 83832688604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 744158 + ... + 796961.

It is an arithmetic number, because the mean of its divisors is an integer number (3915985920).

Almost surely, 2^40688623838 is an apocalyptic number.

40688623838 is a deficient number, since it is larger than the sum of its proper divisors (21967150882).

40688623838 is a wasteful number, since it uses less digits than its factorization.

40688623838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541471.

The product of its (nonzero) digits is 10616832, while the sum is 56.

The spelling of 40688623838 in words is "forty billion, six hundred eighty-eight million, six hundred twenty-three thousand, eight hundred thirty-eight".