168403472831 has 4 divisors (see below), whose sum is σ = 183712879464. Its totient is φ = 153094066200.

The previous prime is 168403472827. The next prime is 168403472879. The reversal of 168403472831 is 138274304861.

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 168403472831 - 2² = 168403472827 is a prime.

It is a super-2 number, since 2×168403472831² (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 (168403474831) 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, 7654703300 + ... + 7654703321.

It is an arithmetic number, because the mean of its divisors is an integer number (45928219866).

Almost surely, 2^168403472831 is an apocalyptic number.

168403472831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

168403472831 is a deficient number, since it is larger than the sum of its proper divisors (15309406633).

168403472831 is a wasteful number, since it uses less digits than its factorization.

168403472831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15309406632.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 168403472831 in words is "one hundred sixty-eight billion, four hundred three million, four hundred seventy-two thousand, eight hundred thirty-one".