81083722115 has 16 divisors (see below), whose sum is σ = 106152097536. Its totient is φ = 58966572000.

The previous prime is 81083722067. The next prime is 81083722133. The reversal of 81083722115 is 51122738018.

It is not a de Polignac number, because 81083722115 - 2¹⁸ = 81083459971 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1297784 + ... + 1358826.

It is an arithmetic number, because the mean of its divisors is an integer number (6634506096).

Almost surely, 2^81083722115 is an apocalyptic number.

81083722115 is a deficient number, since it is larger than the sum of its proper divisors (25068375421).

81083722115 is a wasteful number, since it uses less digits than its factorization.

81083722115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85210.

The product of its (nonzero) digits is 26880, while the sum is 38.

The spelling of 81083722115 in words is "eighty-one billion, eighty-three million, seven hundred twenty-two thousand, one hundred fifteen".