809240737642 has 8 divisors (see below), whose sum is σ = 1213910848800. Its totient is φ = 404603788044.

The previous prime is 809240737637. The next prime is 809240737703. The reversal of 809240737642 is 246737042908.

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 809240737642.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8229292 + ... + 8327047.

It is an arithmetic number, because the mean of its divisors is an integer number (151738856100).

Almost surely, 2^809240737642 is an apocalyptic number.

809240737642 is a deficient number, since it is larger than the sum of its proper divisors (404670111158).

809240737642 is a wasteful number, since it uses less digits than its factorization.

809240737642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16580780.

The product of its (nonzero) digits is 4064256, while the sum is 52.

The spelling of 809240737642 in words is "eight hundred nine billion, two hundred forty million, seven hundred thirty-seven thousand, six hundred forty-two".