81233796774 has 32 divisors (see below), whose sum is σ = 180998385120. Its totient is φ = 24133116672.

The previous prime is 81233796751. The next prime is 81233796779. The reversal of 81233796774 is 47769733218.

It is a happy number.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81233796779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17953927 + ... + 17958450.

It is an arithmetic number, because the mean of its divisors is an integer number (5656199535).

Almost surely, 2^81233796774 is an apocalyptic number.

81233796774 is an abundant number, since it is smaller than the sum of its proper divisors (99764588346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81233796774 is a wasteful number, since it uses less digits than its factorization.

81233796774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35912424.

The product of its digits is 10668672, while the sum is 57.

The spelling of 81233796774 in words is "eighty-one billion, two hundred thirty-three million, seven hundred ninety-six thousand, seven hundred seventy-four".