646519742284 has 48 divisors (see below), whose sum is σ = 1223174887200. Its totient is φ = 297236505600.

The previous prime is 646519742269. The next prime is 646519742287. The reversal of 646519742284 is 482247915646.

646519742284 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (646519742287) 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, 15263367 + ... + 15305665.

It is an arithmetic number, because the mean of its divisors is an integer number (25482810150).

Almost surely, 2^646519742284 is an apocalyptic number.

It is an amenable number.

646519742284 is a deficient number, since it is larger than the sum of its proper divisors (576655144916).

646519742284 is a wasteful number, since it uses less digits than its factorization.

646519742284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43450 (or 43448 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 58.

The spelling of 646519742284 in words is "six hundred forty-six billion, five hundred nineteen million, seven hundred forty-two thousand, two hundred eighty-four".