818401601602 has 8 divisors (see below), whose sum is σ = 1322033356476. Its totient is φ = 377723816112.

The previous prime is 818401601581. The next prime is 818401601617. The reversal of 818401601602 is 206106104818.

It can be written as a sum of positive squares in 2 ways, for example, as 818212511601 + 189090001 = 904551^2 + 13751^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15738492313 + ... + 15738492364.

Almost surely, 2^818401601602 is an apocalyptic number.

818401601602 is a deficient number, since it is larger than the sum of its proper divisors (503631754874).

818401601602 is a wasteful number, since it uses less digits than its factorization.

818401601602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31476984692.

The product of its (nonzero) digits is 18432, while the sum is 37.

The spelling of 818401601602 in words is "eight hundred eighteen billion, four hundred one million, six hundred one thousand, six hundred two".