81862500273 has 8 divisors (see below), whose sum is σ = 112913793600. Its totient is φ = 52693103568.

The previous prime is 81862500199. The next prime is 81862500277. The reversal of 81862500273 is 37200526818.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81862500273 - 2²⁵ = 81828945841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81862500277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 470474053 + ... + 470474226.

It is an arithmetic number, because the mean of its divisors is an integer number (14114224200).

Almost surely, 2^81862500273 is an apocalyptic number.

It is an amenable number.

81862500273 is a deficient number, since it is larger than the sum of its proper divisors (31051293327).

81862500273 is a wasteful number, since it uses less digits than its factorization.

81862500273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940948311.

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 81862500273 in words is "eighty-one billion, eight hundred sixty-two million, five hundred thousand, two hundred seventy-three".