1868491354968 has 144 divisors (see below), whose sum is σ = 5891983606080. Its totient is φ = 533375611776.

The previous prime is 1868491354967. The next prime is 1868491354999. The reversal of 1868491354968 is 8694531948681.

1868491354968 is a `hidden beast` number, since 1 + 8 + 6 + 8 + 4 + 9 + 13 + 549 + 68 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 1868491354896 and 1868491354905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868491354963) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3703705 + ... + 4177847.

It is an arithmetic number, because the mean of its divisors is an integer number (40916552820).

Almost surely, 2^{1868491354968} is an apocalyptic number.

1868491354968 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1868491354968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2945991803040).

1868491354968 is an abundant number, since it is smaller than the sum of its proper divisors (4023492251112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1868491354968 is a wasteful number, since it uses less digits than its factorization.

1868491354968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475286 (or 475272 counting only the distinct ones).

The product of its digits is 358318080, while the sum is 72.

The spelling of 1868491354968 in words is "one trillion, eight hundred sixty-eight billion, four hundred ninety-one million, three hundred fifty-four thousand, nine hundred sixty-eight".