81750011118 has 32 divisors (see below), whose sum is σ = 167260394400. Its totient is φ = 26630125056.

The previous prime is 81750011117. The next prime is 81750011143. The reversal of 81750011118 is 81111005718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81750011117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 808423 + ... + 903906.

It is an arithmetic number, because the mean of its divisors is an integer number (5226887325).

Almost surely, 2^81750011118 is an apocalyptic number.

81750011118 is an abundant number, since it is smaller than the sum of its proper divisors (85510383282).

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

81750011118 is a wasteful number, since it uses less digits than its factorization.

81750011118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712516.

The product of its (nonzero) digits is 2240, while the sum is 33.

The spelling of 81750011118 in words is "eighty-one billion, seven hundred fifty million, eleven thousand, one hundred eighteen".