68431967760 has 160 divisors (see below), whose sum is σ = 231350192640. Its totient is φ = 16631506944.

The previous prime is 68431967753. The next prime is 68431967767. The reversal of 68431967760 is 6776913486.

It is an interprime number because it is at equal distance from previous prime (68431967753) and next prime (68431967767).

It is a self number, because there is not a number n which added to its sum of digits gives 68431967760.

It is not an unprimeable number, because it can be changed into a prime (68431967767) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107662 + ... + 385298.

It is an arithmetic number, because the mean of its divisors is an integer number (1445938704).

Almost surely, 2^68431967760 is an apocalyptic number.

68431967760 is a gapful number since it is divisible by the number (60) 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 68431967760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115675096320).

68431967760 is an abundant number, since it is smaller than the sum of its proper divisors (162918224880).

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

68431967760 is a wasteful number, since it uses less digits than its factorization.

68431967760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277745 (or 277739 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 57.

The spelling of 68431967760 in words is "sixty-eight billion, four hundred thirty-one million, nine hundred sixty-seven thousand, seven hundred sixty".