81446461134 has 16 divisors (see below), whose sum is σ = 172474859088. Its totient is φ = 25551830912.

The previous prime is 81446461081. The next prime is 81446461171. The reversal of 81446461134 is 43116464418.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399247257 + ... + 399247460.

It is an arithmetic number, because the mean of its divisors is an integer number (10779678693).

Almost surely, 2^81446461134 is an apocalyptic number.

81446461134 is an abundant number, since it is smaller than the sum of its proper divisors (91028397954).

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

81446461134 is a wasteful number, since it uses less digits than its factorization.

81446461134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798494739.

The product of its digits is 221184, while the sum is 42.

The spelling of 81446461134 in words is "eighty-one billion, four hundred forty-six million, four hundred sixty-one thousand, one hundred thirty-four".