868779225720 has 512 divisors, whose sum is σ = 3455781120000. Its totient is φ = 193956456960.

The previous prime is 868779225701. The next prime is 868779225749. The reversal of 868779225720 is 27522977868.

868779225720 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 15901650 + ... + 15956190.

It is an arithmetic number, because the mean of its divisors is an integer number (6749572500).

Almost surely, 2^868779225720 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 868779225720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1727890560000).

868779225720 is an abundant number, since it is smaller than the sum of its proper divisors (2587001894280).

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

868779225720 is a wasteful number, since it uses less digits than its factorization.

868779225720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54625 (or 54601 counting only the distinct ones).

The product of its (nonzero) digits is 47416320, while the sum is 63.

The spelling of 868779225720 in words is "eight hundred sixty-eight billion, seven hundred seventy-nine million, two hundred twenty-five thousand, seven hundred twenty".