645015486 has 16 divisors (see below), whose sum is σ = 1292822784. Its totient is φ = 214539864.

The previous prime is 645015467. The next prime is 645015491. The reversal of 645015486 is 684510546.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113316 + ... + 118871.

It is an arithmetic number, because the mean of its divisors is an integer number (80801424).

Almost surely, 2^645015486 is an apocalyptic number.

645015486 is an abundant number, since it is smaller than the sum of its proper divisors (647807298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645015486 is a wasteful number, since it uses less digits than its factorization.

645015486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232655.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 645015486 is about 25397.1550768979. The cubic root of 645015486 is about 864.0191744930.

The spelling of 645015486 in words is "six hundred forty-five million, fifteen thousand, four hundred eighty-six".