809012961542 has 8 divisors (see below), whose sum is σ = 1215275623032. Its totient is φ = 403921087200.

The previous prime is 809012961527. The next prime is 809012961557. The reversal of 809012961542 is 245169210908.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (809012961527) and next prime (809012961557).

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

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 3 ways as a sum of consecutive naturals, for example, 292695059 + ... + 292697822.

It is an arithmetic number, because the mean of its divisors is an integer number (151909452879).

Almost surely, 2^809012961542 is an apocalyptic number.

809012961542 is a deficient number, since it is larger than the sum of its proper divisors (406262661490).

809012961542 is a wasteful number, since it uses less digits than its factorization.

809012961542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585393574.

The product of its (nonzero) digits is 311040, while the sum is 47.

The spelling of 809012961542 in words is "eight hundred nine billion, twelve million, nine hundred sixty-one thousand, five hundred forty-two".