646146158340 has 48 divisors (see below), whose sum is σ = 1812132141120. Its totient is φ = 172027271040.

The previous prime is 646146158323. The next prime is 646146158351. The reversal of 646146158340 is 43851641646.

It is a self number, because there is not a number n which added to its sum of digits gives 646146158340.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8661651 + ... + 8735930.

It is an arithmetic number, because the mean of its divisors is an integer number (37752752940).

Almost surely, 2^646146158340 is an apocalyptic number.

646146158340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

646146158340 is an abundant number, since it is smaller than the sum of its proper divisors (1165985982780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646146158340 is a wasteful number, since it uses less digits than its factorization.

646146158340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17398212 (or 17398210 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 48.

Adding to 646146158340 its reverse (43851641646), we get a palindrome (689997799986).

The spelling of 646146158340 in words is "six hundred forty-six billion, one hundred forty-six million, one hundred fifty-eight thousand, three hundred forty".