81410594 has 4 divisors (see below), whose sum is σ = 122115894. Its totient is φ = 40705296.

The previous prime is 81410591. The next prime is 81410617. The reversal of 81410594 is 49501418.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49501418 = 2 ⋅24750709.

It can be written as a sum of positive squares in only one way, i.e., 64080025 + 17330569 = 8005^2 + 4163^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 81410594.

It is not an unprimeable number, because it can be changed into a prime (81410591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20352647 + ... + 20352650.

Almost surely, 2^81410594 is an apocalyptic number.

81410594 is a deficient number, since it is larger than the sum of its proper divisors (40705300).

81410594 is a wasteful number, since it uses less digits than its factorization.

81410594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40705299.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 81410594 is about 9022.7819435028. The cubic root of 81410594 is about 433.4047244639.

The spelling of 81410594 in words is "eighty-one million, four hundred ten thousand, five hundred ninety-four".