40187494538 has 8 divisors (see below), whose sum is σ = 60282952032. Its totient is φ = 20093177196.

The previous prime is 40187494531. The next prime is 40187494547. The reversal of 40187494538 is 83549478104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 40187494538.

It is not an unprimeable number, because it can be changed into a prime (40187494531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190670 + ... + 341657.

It is an arithmetic number, because the mean of its divisors is an integer number (7535369004).

Almost surely, 2^40187494538 is an apocalyptic number.

40187494538 is a deficient number, since it is larger than the sum of its proper divisors (20095457494).

40187494538 is a wasteful number, since it uses less digits than its factorization.

40187494538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570076.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 40187494538 in words is "forty billion, one hundred eighty-seven million, four hundred ninety-four thousand, five hundred thirty-eight".