81724258114 has 8 divisors (see below), whose sum is σ = 126813504060. Its totient is φ = 39453090096.

The previous prime is 81724258111. The next prime is 81724258139. The reversal of 81724258114 is 41185242718.

It can be written as a sum of positive squares in 2 ways, for example, as 74102095089 + 7622163025 = 272217^2 + 87305^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (81724258111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 704519409 + ... + 704519524.

Almost surely, 2^81724258114 is an apocalyptic number.

81724258114 is a deficient number, since it is larger than the sum of its proper divisors (45089245946).

81724258114 is a wasteful number, since it uses less digits than its factorization.

81724258114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409038964.

The product of its digits is 143360, while the sum is 43.

The spelling of 81724258114 in words is "eighty-one billion, seven hundred twenty-four million, two hundred fifty-eight thousand, one hundred fourteen".