168153686351861 has 8 divisors (see below), whose sum is σ = 202290148994880. Its totient is φ = 136545850571328.

The previous prime is 168153686351857. The next prime is 168153686351891.

168153686351861 is nontrivially palindromic in base 10.

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 168153686351861 - 2² = 168153686351857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 168153686351791 and 168153686351800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168153686351891) 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, 632156715476 + ... + 632156715741.

It is an arithmetic number, because the mean of its divisors is an integer number (25286268624360).

Almost surely, 2^{168153686351861} is an apocalyptic number.

It is an amenable number.

168153686351861 is a deficient number, since it is larger than the sum of its proper divisors (34136462643019).

168153686351861 is a wasteful number, since it uses less digits than its factorization.

168153686351861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264313431243.

The product of its digits is 149299200, while the sum is 68.

The spelling of 168153686351861 in words is "one hundred sixty-eight trillion, one hundred fifty-three billion, six hundred eighty-six million, three hundred fifty-one thousand, eight hundred sixty-one".