81103526774 has 8 divisors (see below), whose sum is σ = 123368745168. Its totient is φ = 39980611720.

The previous prime is 81103526753. The next prime is 81103526797. The reversal of 81103526774 is 47762530118.

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, 285575657 + ... + 285575940.

It is an arithmetic number, because the mean of its divisors is an integer number (15421093146).

Almost surely, 2^81103526774 is an apocalyptic number.

81103526774 is a deficient number, since it is larger than the sum of its proper divisors (42265218394).

81103526774 is a wasteful number, since it uses less digits than its factorization.

81103526774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571151670.

The product of its (nonzero) digits is 282240, while the sum is 44.

The spelling of 81103526774 in words is "eighty-one billion, one hundred three million, five hundred twenty-six thousand, seven hundred seventy-four".