646825963 has 8 divisors (see below), whose sum is σ = 757260000. Its totient is φ = 540899520.

The previous prime is 646825951. The next prime is 646825969. The reversal of 646825963 is 369528646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 646825963 - 2⁵ = 646825931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646825969) 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, 1126588 + ... + 1127161.

It is an arithmetic number, because the mean of its divisors is an integer number (94657500).

Almost surely, 2^646825963 is an apocalyptic number.

646825963 is a deficient number, since it is larger than the sum of its proper divisors (110434037).

646825963 is a wasteful number, since it uses less digits than its factorization.

646825963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253797.

The product of its digits is 1866240, while the sum is 49.

The square root of 646825963 is about 25432.7734036223. The cubic root of 646825963 is about 864.8268168777.

The spelling of 646825963 in words is "six hundred forty-six million, eight hundred twenty-five thousand, nine hundred sixty-three".