68331024551 has 4 divisors (see below), whose sum is σ = 68353148400. Its totient is φ = 68308900704.

The previous prime is 68331024511. The next prime is 68331024557. The reversal of 68331024551 is 15542013386.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15542013386 = 2 ⋅7771006693.

It is a cyclic number.

It is not a de Polignac number, because 68331024551 - 2¹⁴ = 68331008167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68331024557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11057291 + ... + 11063468.

It is an arithmetic number, because the mean of its divisors is an integer number (17088287100).

Almost surely, 2^68331024551 is an apocalyptic number.

68331024551 is a deficient number, since it is larger than the sum of its proper divisors (22123849).

68331024551 is a wasteful number, since it uses less digits than its factorization.

68331024551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22123848.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 68331024551 in words is "sixty-eight billion, three hundred thirty-one million, twenty-four thousand, five hundred fifty-one".