646118160 has 40 divisors (see below), whose sum is σ = 2002967040. Its totient is φ = 172298112.

The previous prime is 646118147. The next prime is 646118183. The reversal of 646118160 is 61811646.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1345840 + ... + 1346319.

It is an arithmetic number, because the mean of its divisors is an integer number (50074176).

Almost surely, 2^646118160 is an apocalyptic number.

646118160 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

646118160 is an abundant number, since it is smaller than the sum of its proper divisors (1356848880).

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

646118160 is a wasteful number, since it uses less digits than its factorization.

646118160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2692175 (or 2692169 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 646118160 is about 25418.8544195052. The cubic root of 646118160 is about 864.5112500617.

It can be divided in two parts, 64611 and 8160, that added together give a triangular number (72771 = T₃₈₁).

The spelling of 646118160 in words is "six hundred forty-six million, one hundred eighteen thousand, one hundred sixty".