646210545 has 32 divisors (see below), whose sum is σ = 1096374528. Its totient is φ = 323893248.

The previous prime is 646210529. The next prime is 646210549. The reversal of 646210545 is 545012646.

It is not a de Polignac number, because 646210545 - 2⁴ = 646210529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646210549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 224757 + ... + 227613.

It is an arithmetic number, because the mean of its divisors is an integer number (34261704).

Almost surely, 2^646210545 is an apocalyptic number.

It is an amenable number.

646210545 is a deficient number, since it is larger than the sum of its proper divisors (450163983).

646210545 is a wasteful number, since it uses less digits than its factorization.

646210545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3769.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 646210545 is about 25420.6716079650. The cubic root of 646210545 is about 864.5524520536.

The spelling of 646210545 in words is "six hundred forty-six million, two hundred ten thousand, five hundred forty-five".