68768351872 has 64 divisors (see below), whose sum is σ = 150228912960. Its totient is φ = 31096258560.

The previous prime is 68768351863. The next prime is 68768351903. The reversal of 68768351872 is 27815386786.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 68768351872.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145213 + ... + 398275.

It is an arithmetic number, because the mean of its divisors is an integer number (2347326765).

Almost surely, 2^68768351872 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 68768351872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75114456480).

68768351872 is an abundant number, since it is smaller than the sum of its proper divisors (81460561088).

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

68768351872 is a wasteful number, since it uses less digits than its factorization.

68768351872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253281 (or 253269 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 61.

The spelling of 68768351872 in words is "sixty-eight billion, seven hundred sixty-eight million, three hundred fifty-one thousand, eight hundred seventy-two".