40688623844 has 12 divisors (see below), whose sum is σ = 77678281968. Its totient is φ = 18494829000.

The previous prime is 40688623841. The next prime is 40688623879. The reversal of 40688623844 is 44832688604.

It is a super-2 number, since 2×40688623844² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40688623841) 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 3 ways as a sum of consecutive naturals, for example, 462370682 + ... + 462370769.

It is an arithmetic number, because the mean of its divisors is an integer number (6473190164).

Almost surely, 2^40688623844 is an apocalyptic number.

40688623844 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

40688623844 is a deficient number, since it is larger than the sum of its proper divisors (36989658124).

40688623844 is a wasteful number, since it uses less digits than its factorization.

40688623844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924741466 (or 924741464 counting only the distinct ones).

The product of its (nonzero) digits is 7077888, while the sum is 53.

The spelling of 40688623844 in words is "forty billion, six hundred eighty-eight million, six hundred twenty-three thousand, eight hundred forty-four".