81040411734 has 32 divisors (see below), whose sum is σ = 165889430784. Its totient is φ = 26379000480.

The previous prime is 81040411729. The next prime is 81040411741. The reversal of 81040411734 is 43711404018.

It is a junction number, because it is equal to n+sod(n) for n = 81040411695 and 81040411704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1124239 + ... + 1194149.

It is an arithmetic number, because the mean of its divisors is an integer number (5184044712).

Almost surely, 2^81040411734 is an apocalyptic number.

81040411734 is an abundant number, since it is smaller than the sum of its proper divisors (84849019050).

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

81040411734 is a wasteful number, since it uses less digits than its factorization.

81040411734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74452.

The product of its (nonzero) digits is 10752, while the sum is 33.

The spelling of 81040411734 in words is "eighty-one billion, forty million, four hundred eleven thousand, seven hundred thirty-four".