451640615 has 16 divisors (see below), whose sum is σ = 576162720. Its totient is φ = 338688000.

The previous prime is 451640603. The next prime is 451640617. The reversal of 451640615 is 516046154.

It is not a de Polignac number, because 451640615 - 2¹² = 451636519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451640617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10751 + ... + 31919.

It is an arithmetic number, because the mean of its divisors is an integer number (36010170).

Almost surely, 2^451640615 is an apocalyptic number.

451640615 is a deficient number, since it is larger than the sum of its proper divisors (124522105).

451640615 is a wasteful number, since it uses less digits than its factorization.

451640615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21442.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 451640615 is about 21251.8379205188. The cubic root of 451640615 is about 767.2395760794.

Adding to 451640615 its reverse (516046154), we get a palindrome (967686769).

The spelling of 451640615 in words is "four hundred fifty-one million, six hundred forty thousand, six hundred fifteen".