168871431469 has 8 divisors (see below), whose sum is σ = 181864732952. Its totient is φ = 155878585920.

The previous prime is 168871431431. The next prime is 168871431481. The reversal of 168871431469 is 964134178861.

It can be written as a sum of positive squares in 4 ways, for example, as 11889067369 + 156982364100 = 109037^2 + 396210^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 168871431469 - 2⁹ = 168871430957 is a prime.

It is a super-2 number, since 2×168871431469² (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 (168871411469) 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, 1413859 + ... + 1528639.

It is an arithmetic number, because the mean of its divisors is an integer number (22733091619).

Almost surely, 2^168871431469 is an apocalyptic number.

It is an amenable number.

168871431469 is a deficient number, since it is larger than the sum of its proper divisors (12993301483).

168871431469 is a wasteful number, since it uses less digits than its factorization.

168871431469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227967.

The product of its digits is 6967296, while the sum is 58.

The spelling of 168871431469 in words is "one hundred sixty-eight billion, eight hundred seventy-one million, four hundred thirty-one thousand, four hundred sixty-nine".