645462624 has 48 divisors (see below), whose sum is σ = 1706564160. Its totient is φ = 213601920.

The previous prime is 645462611. The next prime is 645462659. The reversal of 645462624 is 426264546.

645462624 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

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, 10842 + ... + 37529.

It is an arithmetic number, because the mean of its divisors is an integer number (35553420).

Almost surely, 2^645462624 is an apocalyptic number.

It is an amenable number.

645462624 is an abundant number, since it is smaller than the sum of its proper divisors (1061101536).

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

645462624 is a wasteful number, since it uses less digits than its factorization.

645462624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48523 (or 48515 counting only the distinct ones).

The product of its digits is 276480, while the sum is 39.

The square root of 645462624 is about 25405.9564669390. The cubic root of 645462624 is about 864.2187803301.

The spelling of 645462624 in words is "six hundred forty-five million, four hundred sixty-two thousand, six hundred twenty-four".