82171400073 has 32 divisors (see below), whose sum is σ = 134446417920. Its totient is φ = 43570571520.

The previous prime is 82171400063. The next prime is 82171400083. The reversal of 82171400073 is 37000417128.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (82171400063) and next prime (82171400083).

It is not a de Polignac number, because 82171400073 - 2⁴ = 82171400057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82171400063) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1595583 + ... + 1646276.

It is an arithmetic number, because the mean of its divisors is an integer number (4201450560).

Almost surely, 2^82171400073 is an apocalyptic number.

It is an amenable number.

82171400073 is a deficient number, since it is larger than the sum of its proper divisors (52275017847).

82171400073 is a wasteful number, since it uses less digits than its factorization.

82171400073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3241957.

The product of its (nonzero) digits is 9408, while the sum is 33.

The spelling of 82171400073 in words is "eighty-two billion, one hundred seventy-one million, four hundred thousand, seventy-three".