68816451 has 24 divisors (see below), whose sum is σ = 101907792. Its totient is φ = 41272000.

The previous prime is 68816441. The next prime is 68816471. The reversal of 68816451 is 15461886.

It is not a de Polignac number, because 68816451 - 2¹⁸ = 68554307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68816401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35725 + ... + 37601.

It is an arithmetic number, because the mean of its divisors is an integer number (4246158).

Almost surely, 2^68816451 is an apocalyptic number.

68816451 is a deficient number, since it is larger than the sum of its proper divisors (33091341).

68816451 is a wasteful number, since it uses less digits than its factorization.

68816451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2003 (or 1992 counting only the distinct ones).

The product of its digits is 46080, while the sum is 39.

The square root of 68816451 is about 8295.5681541411. The cubic root of 68816451 is about 409.7925799932.

The spelling of 68816451 in words is "sixty-eight million, eight hundred sixteen thousand, four hundred fifty-one".