809136551042 has 8 divisors (see below), whose sum is σ = 1241930520336. Its totient is φ = 395159710932.

The previous prime is 809136551033. The next prime is 809136551051. The reversal of 809136551042 is 240155631908.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (809136551033) and next prime (809136551051).

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

It is a super-3 number, since 3×809136551042³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 809136550984 and 809136551002.

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, 4704282188 + ... + 4704282359.

It is an arithmetic number, because the mean of its divisors is an integer number (155241315042).

Almost surely, 2^809136551042 is an apocalyptic number.

809136551042 is a deficient number, since it is larger than the sum of its proper divisors (432793969294).

809136551042 is a wasteful number, since it uses less digits than its factorization.

809136551042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9408564592.

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 809136551042 in words is "eight hundred nine billion, one hundred thirty-six million, five hundred fifty-one thousand, forty-two".