81682122633 has 8 divisors (see below), whose sum is σ = 108910843968. Its totient is φ = 54454074864.

The previous prime is 81682122623. The next prime is 81682122637. The reversal of 81682122633 is 33622128618.

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

It is not a de Polignac number, because 81682122633 - 2¹³ = 81682114441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81682122637) 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, 303435 + ... + 505407.

It is an arithmetic number, because the mean of its divisors is an integer number (13613855496).

Almost surely, 2^81682122633 is an apocalyptic number.

It is an amenable number.

81682122633 is a deficient number, since it is larger than the sum of its proper divisors (27228721335).

81682122633 is a wasteful number, since it uses less digits than its factorization.

81682122633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336783.

The product of its digits is 165888, while the sum is 42.

The spelling of 81682122633 in words is "eighty-one billion, six hundred eighty-two million, one hundred twenty-two thousand, six hundred thirty-three".