68886763521 has 8 divisors (see below), whose sum is σ = 91883571360. Its totient is φ = 45907232352.

The previous prime is 68886763471. The next prime is 68886763541. The reversal of 68886763521 is 12536768886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68886763521 - 2²¹ = 68884666369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68886763541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4309860 + ... + 4325813.

It is an arithmetic number, because the mean of its divisors is an integer number (11485446420).

Almost surely, 2^68886763521 is an apocalyptic number.

It is an amenable number.

68886763521 is a deficient number, since it is larger than the sum of its proper divisors (22996807839).

68886763521 is a wasteful number, since it uses less digits than its factorization.

68886763521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8638335.

The product of its digits is 23224320, while the sum is 60.

The spelling of 68886763521 in words is "sixty-eight billion, eight hundred eighty-six million, seven hundred sixty-three thousand, five hundred twenty-one".