81513595058 has 8 divisors (see below), whose sum is σ = 139737591552. Its totient is φ = 34934397876.

The previous prime is 81513595021. The next prime is 81513595091. The reversal of 81513595058 is 85059531518.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 81513594997 and 81513595015.

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, 2911199810 + ... + 2911199837.

It is an arithmetic number, because the mean of its divisors is an integer number (17467198944).

Almost surely, 2^81513595058 is an apocalyptic number.

81513595058 is a deficient number, since it is larger than the sum of its proper divisors (58223996494).

81513595058 is a wasteful number, since it uses less digits than its factorization.

81513595058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5822399656.

The product of its (nonzero) digits is 1080000, while the sum is 50.

The spelling of 81513595058 in words is "eighty-one billion, five hundred thirteen million, five hundred ninety-five thousand, fifty-eight".