168426347631 has 4 divisors (see below), whose sum is σ = 224568463512. Its totient is φ = 112284231752.

The previous prime is 168426347629. The next prime is 168426347669. The reversal of 168426347631 is 136743624861.

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 168426347631 - 2¹ = 168426347629 is a prime.

It is a super-3 number, since 3×168426347631³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168426347671) 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, 28071057936 + ... + 28071057941.

It is an arithmetic number, because the mean of its divisors is an integer number (56142115878).

Almost surely, 2^168426347631 is an apocalyptic number.

168426347631 is a deficient number, since it is larger than the sum of its proper divisors (56142115881).

168426347631 is an equidigital number, since it uses as much as digits as its factorization.

168426347631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56142115880.

The product of its digits is 3483648, while the sum is 51.

The spelling of 168426347631 in words is "one hundred sixty-eight billion, four hundred twenty-six million, three hundred forty-seven thousand, six hundred thirty-one".