81874182365 has 8 divisors (see below), whose sum is σ = 98252054880. Its totient is φ = 65497321872.

The previous prime is 81874182361. The next prime is 81874182389. The reversal of 81874182365 is 56328147818.

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

It is a cyclic number.

It is not a de Polignac number, because 81874182365 - 2² = 81874182361 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81874182361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61895 + ... + 409364.

It is an arithmetic number, because the mean of its divisors is an integer number (12281506860).

Almost surely, 2^81874182365 is an apocalyptic number.

It is an amenable number.

81874182365 is a deficient number, since it is larger than the sum of its proper divisors (16377872515).

81874182365 is a wasteful number, since it uses less digits than its factorization.

81874182365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506011.

The product of its digits is 2580480, while the sum is 53.

The spelling of 81874182365 in words is "eighty-one billion, eight hundred seventy-four million, one hundred eighty-two thousand, three hundred sixty-five".