868217801490 has 160 divisors (see below), whose sum is σ = 2517094719216. Its totient is φ = 213462397440.

The previous prime is 868217801393. The next prime is 868217801513. The reversal of 868217801490 is 94108712868.

868217801490 is a `hidden beast` number, since 8 + 6 + 82 + 1 + 78 + 0 + 1 + 490 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 172957006161 + 695260795329 = 415881^2 + 833823^2 .

It is a super-3 number, since 3×868217801490³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 8933760 + ... + 9030420.

Almost surely, 2^868217801490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 868217801490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1258547359608).

868217801490 is an abundant number, since it is smaller than the sum of its proper divisors (1648876917726).

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

868217801490 is a wasteful number, since it uses less digits than its factorization.

868217801490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97546 (or 97537 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The spelling of 868217801490 in words is "eight hundred sixty-eight billion, two hundred seventeen million, eight hundred one thousand, four hundred ninety".