81362167548 has 24 divisors (see below), whose sum is σ = 189863410128. Its totient is φ = 27118100736.

The previous prime is 81362167547. The next prime is 81362167559. The reversal of 81362167548 is 84576126318.

It is a self number, because there is not a number n which added to its sum of digits gives 81362167548.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81362167541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196311 + ... + 448622.

It is an arithmetic number, because the mean of its divisors is an integer number (7910975422).

Almost surely, 2^81362167548 is an apocalyptic number.

It is an amenable number.

81362167548 is an abundant number, since it is smaller than the sum of its proper divisors (108501242580).

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

81362167548 is a wasteful number, since it uses less digits than its factorization.

81362167548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655453 (or 655451 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 51.

The spelling of 81362167548 in words is "eighty-one billion, three hundred sixty-two million, one hundred sixty-seven thousand, five hundred forty-eight".