81089151756 has 24 divisors (see below), whose sum is σ = 191487637824. Its totient is φ = 26704057680.

The previous prime is 81089151733. The next prime is 81089151757. The reversal of 81089151756 is 65715198018.

It is a junction number, because it is equal to n+sod(n) for n = 81089151699 and 81089151708.

It is not an unprimeable number, because it can be changed into a prime (81089151757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40706410 + ... + 40708401.

It is an arithmetic number, because the mean of its divisors is an integer number (7978651576).

Almost surely, 2^81089151756 is an apocalyptic number.

It is an amenable number.

81089151756 is an abundant number, since it is smaller than the sum of its proper divisors (110398486068).

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

81089151756 is a wasteful number, since it uses less digits than its factorization.

81089151756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81414901 (or 81414899 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 51.

The spelling of 81089151756 in words is "eighty-one billion, eighty-nine million, one hundred fifty-one thousand, seven hundred fifty-six".