646155046 has 12 divisors (see below), whose sum is σ = 974319012. Its totient is φ = 321384656.

The previous prime is 646155007. The next prime is 646155049. The reversal of 646155046 is 640551646.

It is a junction number, because it is equal to n+sod(n) for n = 646154996 and 646155014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646155049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 541026 + ... + 542218.

It is an arithmetic number, because the mean of its divisors is an integer number (81193251).

Almost surely, 2^646155046 is an apocalyptic number.

646155046 is a deficient number, since it is larger than the sum of its proper divisors (328163966).

646155046 is an equidigital number, since it uses as much as digits as its factorization.

646155046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615 (or 1422 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 646155046 is about 25419.5799729264. The cubic root of 646155046 is about 864.5277010027.

The spelling of 646155046 in words is "six hundred forty-six million, one hundred fifty-five thousand, forty-six".