82169668431 has 10 divisors (see below), whose sum is σ = 122747282592. Its totient is φ = 54779778900.

The previous prime is 82169668411. The next prime is 82169668439. The reversal of 82169668431 is 13486696128.

It is not a de Polignac number, because 82169668431 - 2⁶ = 82169668367 is a prime.

It is a super-2 number, since 2×82169668431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82169668439) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 507220095 + ... + 507220256.

Almost surely, 2^82169668431 is an apocalyptic number.

82169668431 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

82169668431 is a deficient number, since it is larger than the sum of its proper divisors (40577614161).

82169668431 is a wasteful number, since it uses less digits than its factorization.

82169668431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014440363 (or 1014440354 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The spelling of 82169668431 in words is "eighty-two billion, one hundred sixty-nine million, six hundred sixty-eight thousand, four hundred thirty-one".