646560147 has 4 divisors (see below), whose sum is σ = 862080200. Its totient is φ = 431040096.

The previous prime is 646560127. The next prime is 646560181. The reversal of 646560147 is 741065646.

646560147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 646560147 - 2⁸ = 646559891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646560127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107760022 + ... + 107760027.

It is an arithmetic number, because the mean of its divisors is an integer number (215520050).

Almost surely, 2^646560147 is an apocalyptic number.

646560147 is a deficient number, since it is larger than the sum of its proper divisors (215520053).

646560147 is a wasteful number, since it uses less digits than its factorization.

646560147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215520052.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 646560147 is about 25427.5470110666. The cubic root of 646560147 is about 864.7083325062.

The spelling of 646560147 in words is "six hundred forty-six million, five hundred sixty thousand, one hundred forty-seven".