81134736 has 40 divisors (see below), whose sum is σ = 214715424. Its totient is φ = 26384640.

The previous prime is 81134723. The next prime is 81134771. The reversal of 81134736 is 63743118.

It is a junction number, because it is equal to n+sod(n) for n = 81134697 and 81134706.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18646 + ... + 22581.

Almost surely, 2^81134736 is an apocalyptic number.

It is an amenable number.

81134736 is an abundant number, since it is smaller than the sum of its proper divisors (133580688).

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

81134736 is a wasteful number, since it uses less digits than its factorization.

81134736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41279 (or 41273 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 81134736 is about 9007.4822231298. The cubic root of 81134736 is about 432.9146430570.

The spelling of 81134736 in words is "eighty-one million, one hundred thirty-four thousand, seven hundred thirty-six".