168611861747 has 48 divisors (see below), whose sum is σ = 208594582560. Its totient is φ = 135512068608.

The previous prime is 168611861729. The next prime is 168611861773. The reversal of 168611861747 is 747168116861.

It is not a de Polignac number, because 168611861747 - 2¹⁸ = 168611599603 is a prime.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 168611861692 and 168611861701.

It is not an unprimeable number, because it can be changed into a prime (168611861777) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37525433 + ... + 37529925.

It is an arithmetic number, because the mean of its divisors is an integer number (4345720470).

Almost surely, 2^168611861747 is an apocalyptic number.

168611861747 is a deficient number, since it is larger than the sum of its proper divisors (39982720813).

168611861747 is a wasteful number, since it uses less digits than its factorization.

168611861747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4932 (or 4925 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 56.

The spelling of 168611861747 in words is "one hundred sixty-eight billion, six hundred eleven million, eight hundred sixty-one thousand, seven hundred forty-seven".