809502954690 has 16 divisors (see below), whose sum is σ = 1942807091328. Its totient is φ = 215867454576.

The previous prime is 809502954653. The next prime is 809502954791. The reversal of 809502954690 is 96459205908.

It is a super-2 number, since 2×809502954690² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 809502954690.

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 7 ways as a sum of consecutive naturals, for example, 13491715882 + ... + 13491715941.

It is an arithmetic number, because the mean of its divisors is an integer number (121425443208).

Almost surely, 2^809502954690 is an apocalyptic number.

809502954690 is an abundant number, since it is smaller than the sum of its proper divisors (1133304136638).

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

809502954690 is a wasteful number, since it uses less digits than its factorization.

809502954690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26983431833.

The product of its (nonzero) digits is 6998400, while the sum is 57.

The spelling of 809502954690 in words is "eight hundred nine billion, five hundred two million, nine hundred fifty-four thousand, six hundred ninety".