81435147094 has 8 divisors (see below), whose sum is σ = 139603109328. Its totient is φ = 34900777320.

The previous prime is 81435147083. The next prime is 81435147097. The reversal of 81435147094 is 49074153418.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81435147097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2908398097 + ... + 2908398124.

It is an arithmetic number, because the mean of its divisors is an integer number (17450388666).

Almost surely, 2^81435147094 is an apocalyptic number.

81435147094 is a deficient number, since it is larger than the sum of its proper divisors (58167962234).

81435147094 is a wasteful number, since it uses less digits than its factorization.

81435147094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5816796230.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 81435147094 in words is "eighty-one billion, four hundred thirty-five million, one hundred forty-seven thousand, ninety-four".