81838053414 has 48 divisors (see below), whose sum is σ = 202188141792. Its totient is φ = 23699706624.

The previous prime is 81838053377. The next prime is 81838053443. The reversal of 81838053414 is 41435083818.

81838053414 is a `hidden beast` number, since 8 + 183 + 8 + 0 + 53 + 414 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 81838053414.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10282354 + ... + 10290309.

It is an arithmetic number, because the mean of its divisors is an integer number (4212252954).

Almost surely, 2^81838053414 is an apocalyptic number.

81838053414 is an abundant number, since it is smaller than the sum of its proper divisors (120350088378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81838053414 is a wasteful number, since it uses less digits than its factorization.

81838053414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20572701 (or 20572698 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 81838053414 in words is "eighty-one billion, eight hundred thirty-eight million, fifty-three thousand, four hundred fourteen".