646488753 has 16 divisors (see below), whose sum is σ = 901993536. Its totient is φ = 411428160.

The previous prime is 646488749. The next prime is 646488763. The reversal of 646488753 is 357884646.

It is not a de Polignac number, because 646488753 - 2² = 646488749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 646488696 and 646488705.

It is not an unprimeable number, because it can be changed into a prime (646488763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49063 + ... + 60828.

It is an arithmetic number, because the mean of its divisors is an integer number (56374596).

Almost surely, 2^646488753 is an apocalyptic number.

It is an amenable number.

646488753 is a deficient number, since it is larger than the sum of its proper divisors (255504783).

646488753 is a wasteful number, since it uses less digits than its factorization.

646488753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109984.

The product of its digits is 3870720, while the sum is 51.

The square root of 646488753 is about 25426.1431011469. The cubic root of 646488753 is about 864.6765039339.

The spelling of 646488753 in words is "six hundred forty-six million, four hundred eighty-eight thousand, seven hundred fifty-three".