68144551 has 16 divisors (see below), whose sum is σ = 74901024. Its totient is φ = 61737984.

The previous prime is 68144533. The next prime is 68144567. The reversal of 68144551 is 15544186.

It is a cyclic number.

It is not a de Polignac number, because 68144551 - 2⁹ = 68144039 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 (68144521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52725 + ... + 54001.

It is an arithmetic number, because the mean of its divisors is an integer number (4681314).

Almost surely, 2^68144551 is an apocalyptic number.

68144551 is a deficient number, since it is larger than the sum of its proper divisors (6756473).

68144551 is a wasteful number, since it uses less digits than its factorization.

68144551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410.

The product of its digits is 19200, while the sum is 34.

The square root of 68144551 is about 8254.9712900773. The cubic root of 68144551 is about 408.4545247752.

The spelling of 68144551 in words is "sixty-eight million, one hundred forty-four thousand, five hundred fifty-one".