646154412 has 12 divisors (see below), whose sum is σ = 1507693656. Its totient is φ = 215384800.

The previous prime is 646154401. The next prime is 646154441. The reversal of 646154412 is 214451646.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26923089 + ... + 26923112.

It is an arithmetic number, because the mean of its divisors is an integer number (125641138).

Almost surely, 2^646154412 is an apocalyptic number.

It is an amenable number.

646154412 is an abundant number, since it is smaller than the sum of its proper divisors (861539244).

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

646154412 is a wasteful number, since it uses less digits than its factorization.

646154412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53846208 (or 53846206 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 646154412 is about 25419.5675022216. The cubic root of 646154412 is about 864.5274182477.

The spelling of 646154412 in words is "six hundred forty-six million, one hundred fifty-four thousand, four hundred twelve".