68705281512 has 448 divisors, whose sum is σ = 234923299200. Its totient is φ = 18391795200.

The previous prime is 68705281507. The next prime is 68705281577. The reversal of 68705281512 is 21518250786.

68705281512 is a `hidden beast` number, since 6 + 8 + 7 + 0 + 52 + 81 + 512 = 666.

It is a super-2 number, since 2×68705281512² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 78340818 + ... + 78341694.

Almost surely, 2^68705281512 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 68705281512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117461649600).

68705281512 is an abundant number, since it is smaller than the sum of its proper divisors (166218017688).

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

68705281512 is a wasteful number, since it uses less digits than its factorization.

68705281512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028 (or 1009 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 45.

The spelling of 68705281512 in words is "sixty-eight billion, seven hundred five million, two hundred eighty-one thousand, five hundred twelve".