68403107511 has 6 divisors (see below), whose sum is σ = 98804488640. Its totient is φ = 45602071668.

The previous prime is 68403107491. The next prime is 68403107533. The reversal of 68403107511 is 11570130486.

It is not a de Polignac number, because 68403107511 - 2²⁵ = 68369553079 is a prime.

It is a super-2 number, since 2×68403107511² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68403107551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3800172631 + ... + 3800172648.

Almost surely, 2^68403107511 is an apocalyptic number.

68403107511 is a deficient number, since it is larger than the sum of its proper divisors (30401381129).

68403107511 is a wasteful number, since it uses less digits than its factorization.

68403107511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7600345285 (or 7600345282 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

Adding to 68403107511 its reverse (11570130486), we get a palindrome (79973237997).

The spelling of 68403107511 in words is "sixty-eight billion, four hundred three million, one hundred seven thousand, five hundred eleven".