68426336551 has 4 divisors (see below), whose sum is σ = 68454579312. Its totient is φ = 68398093792.

The previous prime is 68426336471. The next prime is 68426336567. The reversal of 68426336551 is 15563362486.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68426336551 - 2¹³ = 68426328359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68426336495 and 68426336504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68426336351) 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, 14117746 + ... + 14122591.

It is an arithmetic number, because the mean of its divisors is an integer number (17113644828).

Almost surely, 2^68426336551 is an apocalyptic number.

68426336551 is a deficient number, since it is larger than the sum of its proper divisors (28242761).

68426336551 is a wasteful number, since it uses less digits than its factorization.

68426336551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28242760.

The product of its digits is 3110400, while the sum is 49.

The spelling of 68426336551 in words is "sixty-eight billion, four hundred twenty-six million, three hundred thirty-six thousand, five hundred fifty-one".