81757200183 has 16 divisors (see below), whose sum is σ = 112103038176. Its totient is φ = 52961955840.

The previous prime is 81757200169. The next prime is 81757200221. The reversal of 81757200183 is 38100275718.

It is not a de Polignac number, because 81757200183 - 2⁴ = 81757200167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81757204183) 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, 399466 + ... + 568407.

It is an arithmetic number, because the mean of its divisors is an integer number (7006439886).

Almost surely, 2^81757200183 is an apocalyptic number.

81757200183 is a deficient number, since it is larger than the sum of its proper divisors (30345837993).

81757200183 is a wasteful number, since it uses less digits than its factorization.

81757200183 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968674.

The product of its (nonzero) digits is 94080, while the sum is 42.

The spelling of 81757200183 in words is "eighty-one billion, seven hundred fifty-seven million, two hundred thousand, one hundred eighty-three".