68157451 has 8 divisors (see below), whose sum is σ = 70042544. Its totient is φ = 66286080.

The previous prime is 68157433. The next prime is 68157461. The reversal of 68157451 is 15475186.

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

It is a cyclic number.

It is not a de Polignac number, because 68157451 - 2²³ = 59768843 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68157451.

It is not an unprimeable number, because it can be changed into a prime (68157421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7075 + ... + 13651.

It is an arithmetic number, because the mean of its divisors is an integer number (8755318).

Almost surely, 2^68157451 is an apocalyptic number.

68157451 is a deficient number, since it is larger than the sum of its proper divisors (1885093).

68157451 is a wasteful number, since it uses less digits than its factorization.

68157451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6861.

The product of its digits is 33600, while the sum is 37.

The square root of 68157451 is about 8255.7526004599. The cubic root of 68157451 is about 408.4802971021.

The spelling of 68157451 in words is "sixty-eight million, one hundred fifty-seven thousand, four hundred fifty-one".