42451189865 has 8 divisors (see below), whose sum is σ = 58218774720. Its totient is φ = 29109387312.

The previous prime is 42451189849. The next prime is 42451189871. The reversal of 42451189865 is 56898115424.

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 42451189865 - 2⁴ = 42451189849 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 606445535 + ... + 606445604.

It is an arithmetic number, because the mean of its divisors is an integer number (7277346840).

Almost surely, 2^42451189865 is an apocalyptic number.

It is an amenable number.

42451189865 is a deficient number, since it is larger than the sum of its proper divisors (15767584855).

42451189865 is a wasteful number, since it uses less digits than its factorization.

42451189865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212891151.

The product of its digits is 2764800, while the sum is 53.

The spelling of 42451189865 in words is "forty-two billion, four hundred fifty-one million, one hundred eighty-nine thousand, eight hundred sixty-five".