646177152 has 32 divisors (see below), whose sum is σ = 1716409080. Its totient is φ = 215392256.

The previous prime is 646177141. The next prime is 646177171. The reversal of 646177152 is 251771646.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×646177152² = 835089823533662208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 646177152.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840993 + ... + 841760.

Almost surely, 2^646177152 is an apocalyptic number.

It is an amenable number.

646177152 is an abundant number, since it is smaller than the sum of its proper divisors (1070231928).

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

646177152 is a wasteful number, since it uses less digits than its factorization.

646177152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1682770 (or 1682758 counting only the distinct ones).

The product of its digits is 70560, while the sum is 39.

The square root of 646177152 is about 25420.0147914985. The cubic root of 646177152 is about 864.5375598498.

The spelling of 646177152 in words is "six hundred forty-six million, one hundred seventy-seven thousand, one hundred fifty-two".