81692482831 has 4 divisors (see below), whose sum is σ = 82010352672. Its totient is φ = 81374612992.

The previous prime is 81692482813. The next prime is 81692482841. The reversal of 81692482831 is 13828429618.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81692482831 - 2¹³ = 81692474639 is a prime.

It is a super-2 number, since 2×81692482831² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81692482841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158934535 + ... + 158935048.

It is an arithmetic number, because the mean of its divisors is an integer number (20502588168).

Almost surely, 2^81692482831 is an apocalyptic number.

81692482831 is a deficient number, since it is larger than the sum of its proper divisors (317869841).

81692482831 is a wasteful number, since it uses less digits than its factorization.

81692482831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317869840.

The product of its digits is 1327104, while the sum is 52.

The spelling of 81692482831 in words is "eighty-one billion, six hundred ninety-two million, four hundred eighty-two thousand, eight hundred thirty-one".