81288196294 has 8 divisors (see below), whose sum is σ = 124906252968. Its totient is φ = 39652778640.

The previous prime is 81288196259. The next prime is 81288196331. The reversal of 81288196294 is 49269188218.

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

It is a congruent number.

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, 495659652 + ... + 495659815.

It is an arithmetic number, because the mean of its divisors is an integer number (15613281621).

Almost surely, 2^81288196294 is an apocalyptic number.

81288196294 is a deficient number, since it is larger than the sum of its proper divisors (43618056674).

81288196294 is a wasteful number, since it uses less digits than its factorization.

81288196294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991319510.

The product of its digits is 3981312, while the sum is 58.

The spelling of 81288196294 in words is "eighty-one billion, two hundred eighty-eight million, one hundred ninety-six thousand, two hundred ninety-four".