646342545 has 8 divisors (see below), whose sum is σ = 1034148096. Its totient is φ = 344716016.

The previous prime is 646342507. The next prime is 646342547. The reversal of 646342545 is 545243646.

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 646342545 - 2⁸ = 646342289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646342547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21544737 + ... + 21544766.

It is an arithmetic number, because the mean of its divisors is an integer number (129268512).

Almost surely, 2^646342545 is an apocalyptic number.

It is an amenable number.

646342545 is a deficient number, since it is larger than the sum of its proper divisors (387805551).

646342545 is a wasteful number, since it uses less digits than its factorization.

646342545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43089511.

The product of its digits is 345600, while the sum is 39.

The square root of 646342545 is about 25423.2677875996. The cubic root of 646342545 is about 864.6113147854.

The spelling of 646342545 in words is "six hundred forty-six million, three hundred forty-two thousand, five hundred forty-five".