68636451 has 8 divisors (see below), whose sum is σ = 98554960. Its totient is φ = 42237792.

The previous prime is 68636413. The next prime is 68636461. The reversal of 68636451 is 15463686.

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

It is not a de Polignac number, because 68636451 - 2¹⁴ = 68620067 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 1759909 = 68636451 / (6 + 8 + 6 + 3 + 6 + 4 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68636461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 879916 + ... + 879993.

It is an arithmetic number, because the mean of its divisors is an integer number (12319370).

Almost surely, 2^68636451 is an apocalyptic number.

68636451 is a deficient number, since it is larger than the sum of its proper divisors (29918509).

68636451 is a wasteful number, since it uses less digits than its factorization.

68636451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1759925.

The product of its digits is 103680, while the sum is 39.

The square root of 68636451 is about 8284.7118839462. The cubic root of 68636451 is about 409.4349762058.

The spelling of 68636451 in words is "sixty-eight million, six hundred thirty-six thousand, four hundred fifty-one".