81280852367 has 16 divisors (see below), whose sum is σ = 96417904128. Its totient is φ = 67545485280.

The previous prime is 81280852357. The next prime is 81280852379. The reversal of 81280852367 is 76325808218.

It is a happy number.

It is not a de Polignac number, because 81280852367 - 2⁸ = 81280852111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81280852357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2744483 + ... + 2773940.

It is an arithmetic number, because the mean of its divisors is an integer number (6026119008).

Almost surely, 2^81280852367 is an apocalyptic number.

81280852367 is a deficient number, since it is larger than the sum of its proper divisors (15137051761).

81280852367 is a wasteful number, since it uses less digits than its factorization.

81280852367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5518550.

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 81280852367 in words is "eighty-one billion, two hundred eighty million, eight hundred fifty-two thousand, three hundred sixty-seven".