868798517840 has 240 divisors, whose sum is σ = 2294616135168. Its totient is φ = 305374080000.

The previous prime is 868798517837. The next prime is 868798517843. The reversal of 868798517840 is 48715897868.

It is an interprime number because it is at equal distance from previous prime (868798517837) and next prime (868798517843).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868798517843) 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, 457020890 + ... + 457022790.

Almost surely, 2^868798517840 is an apocalyptic number.

868798517840 is a gapful number since it is divisible by the number (80) 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 868798517840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1147308067584).

868798517840 is an abundant number, since it is smaller than the sum of its proper divisors (1425817617328).

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

868798517840 is a wasteful number, since it uses less digits than its factorization.

868798517840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3490 (or 3473 counting only the distinct ones).

The product of its (nonzero) digits is 216760320, while the sum is 71.

The spelling of 868798517840 in words is "eight hundred sixty-eight billion, seven hundred ninety-eight million, five hundred seventeen thousand, eight hundred forty".