81260718 has 48 divisors (see below), whose sum is σ = 206250624. Its totient is φ = 21105840.

The previous prime is 81260693. The next prime is 81260719. The reversal of 81260718 is 81706218.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81260719) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9330 + ... + 15797.

It is an arithmetic number, because the mean of its divisors is an integer number (4296888).

Almost surely, 2^81260718 is an apocalyptic number.

81260718 is an abundant number, since it is smaller than the sum of its proper divisors (124989906).

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

81260718 is a wasteful number, since it uses less digits than its factorization.

81260718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25157 (or 25150 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 81260718 is about 9014.4726967250. The cubic root of 81260718 is about 433.1385966551.

The spelling of 81260718 in words is "eighty-one million, two hundred sixty thousand, seven hundred eighteen".