1868357812464 has 480 divisors, whose sum is σ = 6420588056064. Its totient is φ = 499071006720.

The previous prime is 1868357812423. The next prime is 1868357812481. The reversal of 1868357812464 is 4642187538681.

1868357812464 is a `hidden beast` number, since 1 + 8 + 6 + 8 + 3 + 578 + 12 + 46 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 320635119 + ... + 320640945.

Almost surely, 2^{1868357812464} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1868357812464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3210294028032).

1868357812464 is an abundant number, since it is smaller than the sum of its proper divisors (4552230243600).

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

1868357812464 is a wasteful number, since it uses less digits than its factorization.

1868357812464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6565 (or 6556 counting only the distinct ones).

The product of its digits is 61931520, while the sum is 63.

The spelling of 1868357812464 in words is "one trillion, eight hundred sixty-eight billion, three hundred fifty-seven million, eight hundred twelve thousand, four hundred sixty-four".