645050364 has 144 divisors (see below), whose sum is σ = 1863633408. Its totient is φ = 169779456.

The previous prime is 645050311. The next prime is 645050377. The reversal of 645050364 is 463050546.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1624614 + ... + 1625010.

Almost surely, 2^645050364 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 645050364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (931816704).

645050364 is an abundant number, since it is smaller than the sum of its proper divisors (1218583044).

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

645050364 is a wasteful number, since it uses less digits than its factorization.

645050364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

The square root of 645050364 is about 25397.8417193273. The cubic root of 645050364 is about 864.0347476166.

The spelling of 645050364 in words is "six hundred forty-five million, fifty thousand, three hundred sixty-four".