645414912 has 120 divisors (see below), whose sum is σ = 1913592800. Its totient is φ = 214990848.

The previous prime is 645414899. The next prime is 645414943. The reversal of 645414912 is 219414546.

645414912 is a `hidden beast` number, since 64 + 541 + 49 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441639 + ... + 443097.

Almost surely, 2^645414912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645414912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (956796400).

645414912 is an abundant number, since it is smaller than the sum of its proper divisors (1268177888).

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

645414912 is an equidigital number, since it uses as much as digits as its factorization.

645414912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1496 (or 1464 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 645414912 is about 25405.0174571875. The cubic root of 645414912 is about 864.1974857212.

The spelling of 645414912 in words is "six hundred forty-five million, four hundred fourteen thousand, nine hundred twelve".