81453116258 has 8 divisors (see below), whose sum is σ = 122793643200. Its totient is φ = 40521901860.

The previous prime is 81453116183. The next prime is 81453116267. The reversal of 81453116258 is 85261135418.

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

It is a super-2 number, since 2×81453116258² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102327638 + ... + 102328433.

It is an arithmetic number, because the mean of its divisors is an integer number (15349205400).

Almost surely, 2^81453116258 is an apocalyptic number.

81453116258 is a deficient number, since it is larger than the sum of its proper divisors (41340526942).

81453116258 is a wasteful number, since it uses less digits than its factorization.

81453116258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204656272.

The product of its digits is 230400, while the sum is 44.

The spelling of 81453116258 in words is "eighty-one billion, four hundred fifty-three million, one hundred sixteen thousand, two hundred fifty-eight".