81635201834 has 8 divisors (see below), whose sum is σ = 122454760608. Its totient is φ = 40816948300.

The previous prime is 81635201783. The next prime is 81635201861. The reversal of 81635201834 is 43810253618.

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 = 81635201791 and 81635201800.

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, 151142 + ... + 431409.

It is an arithmetic number, because the mean of its divisors is an integer number (15306845076).

Almost surely, 2^81635201834 is an apocalyptic number.

81635201834 is a deficient number, since it is larger than the sum of its proper divisors (40819558774).

81635201834 is a wasteful number, since it uses less digits than its factorization.

81635201834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652620.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 81635201834 in words is "eighty-one billion, six hundred thirty-five million, two hundred one thousand, eight hundred thirty-four".