81110224545 has 48 divisors (see below), whose sum is σ = 151102713600. Its totient is φ = 37044973056.

The previous prime is 81110224541. The next prime is 81110224561. The reversal of 81110224545 is 54542201118.

It is not a de Polignac number, because 81110224545 - 2² = 81110224541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81110224541) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 760681 + ... + 860729.

It is an arithmetic number, because the mean of its divisors is an integer number (3147973200).

Almost surely, 2^81110224545 is an apocalyptic number.

It is an amenable number.

81110224545 is a deficient number, since it is larger than the sum of its proper divisors (69992489055).

81110224545 is a wasteful number, since it uses less digits than its factorization.

81110224545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101174 (or 101167 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 33.

The spelling of 81110224545 in words is "eighty-one billion, one hundred ten million, two hundred twenty-four thousand, five hundred forty-five".