81134723035 has 16 divisors (see below), whose sum is σ = 97695599040. Its totient is φ = 64685537280.

The previous prime is 81134723027. The next prime is 81134723051. The reversal of 81134723035 is 53032743118.

It is not a de Polignac number, because 81134723035 - 2³ = 81134723027 is a prime.

It is a super-2 number, since 2×81134723035² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81134722985 and 81134723003.

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 15 ways as a sum of consecutive naturals, for example, 1730026 + ... + 1776304.

It is an arithmetic number, because the mean of its divisors is an integer number (6105974940).

Almost surely, 2^81134723035 is an apocalyptic number.

81134723035 is a deficient number, since it is larger than the sum of its proper divisors (16560876005).

81134723035 is a wasteful number, since it uses less digits than its factorization.

81134723035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47478.

The product of its (nonzero) digits is 60480, while the sum is 37.

The spelling of 81134723035 in words is "eighty-one billion, one hundred thirty-four million, seven hundred twenty-three thousand, thirty-five".