81174361402 has 8 divisors (see below), whose sum is σ = 121763992500. Its totient is φ = 40586363904.

The previous prime is 81174361379. The next prime is 81174361423. The reversal of 81174361402 is 20416347118.

It can be written as a sum of positive squares in 2 ways, for example, as 80360343441 + 814017961 = 283479^2 + 28531^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275527 + ... + 488122.

Almost surely, 2^81174361402 is an apocalyptic number.

81174361402 is a deficient number, since it is larger than the sum of its proper divisors (40589631098).

81174361402 is a wasteful number, since it uses less digits than its factorization.

81174361402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816800.

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 81174361402 in words is "eighty-one billion, one hundred seventy-four million, three hundred sixty-one thousand, four hundred two".