81599824151 has 16 divisors (see below), whose sum is σ = 83371026816. Its totient is φ = 79852500000.

The previous prime is 81599824139. The next prime is 81599824177. The reversal of 81599824151 is 15142899518.

It is a cyclic number.

It is not a de Polignac number, because 81599824151 - 2¹⁸ = 81599562007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81599824093 and 81599824102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81599824451) 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, 3308696 + ... + 3333266.

It is an arithmetic number, because the mean of its divisors is an integer number (5210689176).

Almost surely, 2^81599824151 is an apocalyptic number.

81599824151 is a deficient number, since it is larger than the sum of its proper divisors (1771202665).

81599824151 is a wasteful number, since it uses less digits than its factorization.

81599824151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25054.

The product of its digits is 1036800, while the sum is 53.

The spelling of 81599824151 in words is "eighty-one billion, five hundred ninety-nine million, eight hundred twenty-four thousand, one hundred fifty-one".