68512107381 has 16 divisors (see below), whose sum is σ = 93243182400. Its totient is φ = 44733642368.

The previous prime is 68512107379. The next prime is 68512107431. The reversal of 68512107381 is 18370121586.

It is a cyclic number.

It is not a de Polignac number, because 68512107381 - 2¹ = 68512107379 is a prime.

It is a super-2 number, since 2×68512107381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68512107341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 671856 + ... + 767081.

It is an arithmetic number, because the mean of its divisors is an integer number (5827698900).

Almost surely, 2^68512107381 is an apocalyptic number.

It is an amenable number.

68512107381 is a deficient number, since it is larger than the sum of its proper divisors (24731075019).

68512107381 is a wasteful number, since it uses less digits than its factorization.

68512107381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439268.

The product of its (nonzero) digits is 80640, while the sum is 42.

The spelling of 68512107381 in words is "sixty-eight billion, five hundred twelve million, one hundred seven thousand, three hundred eighty-one".