40187868640 has 48 divisors (see below), whose sum is σ = 95512429152. Its totient is φ = 15978878464.

The previous prime is 40187868619. The next prime is 40187868667. The reversal of 40187868640 is 4686878104.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 725299 + ... + 778738.

It is an arithmetic number, because the mean of its divisors is an integer number (1989842274).

Almost surely, 2^40187868640 is an apocalyptic number.

40187868640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40187868640 is an abundant number, since it is smaller than the sum of its proper divisors (55324560512).

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

40187868640 is a wasteful number, since it uses less digits than its factorization.

40187868640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504219 (or 1504211 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 52.

The spelling of 40187868640 in words is "forty billion, one hundred eighty-seven million, eight hundred sixty-eight thousand, six hundred forty".