81627796237049 has 16 divisors (see below), whose sum is σ = 84585710379840. Its totient is φ = 78679482840000.

The previous prime is 81627796236911. The next prime is 81627796237051. The reversal of 81627796237049 is 94073269772618.

It is a cyclic number.

It is not a de Polignac number, because 81627796237049 - 2¹⁶ = 81627796171513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81627796267049) 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, 80675219 + ... + 81680759.

It is an arithmetic number, because the mean of its divisors is an integer number (5286606898740).

Almost surely, 2^{81627796237049} is an apocalyptic number.

It is an amenable number.

81627796237049 is a deficient number, since it is larger than the sum of its proper divisors (2957914142791).

81627796237049 is a wasteful number, since it uses less digits than its factorization.

81627796237049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010312.

The product of its (nonzero) digits is 384072192, while the sum is 71.

The spelling of 81627796237049 in words is "eighty-one trillion, six hundred twenty-seven billion, seven hundred ninety-six million, two hundred thirty-seven thousand, forty-nine".