68042551 has 8 divisors (see below), whose sum is σ = 74369664. Its totient is φ = 61973760.

The previous prime is 68042531. The next prime is 68042567. The reversal of 68042551 is 15524086.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68042551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68042531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64030 + ... + 65083.

It is an arithmetic number, because the mean of its divisors is an integer number (9296208).

Almost surely, 2^68042551 is an apocalyptic number.

68042551 is a deficient number, since it is larger than the sum of its proper divisors (6327113).

68042551 is a wasteful number, since it uses less digits than its factorization.

68042551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129161.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 68042551 is about 8248.7908810928. The cubic root of 68042551 is about 408.2506289625.

The spelling of 68042551 in words is "sixty-eight million, forty-two thousand, five hundred fifty-one".