645150424 has 16 divisors (see below), whose sum is σ = 1248678720. Its totient is φ = 312169440.

The previous prime is 645150413. The next prime is 645150431. The reversal of 645150424 is 424051546.

It is a happy number.

645150424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

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, 1300459 + ... + 1300954.

It is an arithmetic number, because the mean of its divisors is an integer number (78042420).

Almost surely, 2^645150424 is an apocalyptic number.

It is an amenable number.

645150424 is a deficient number, since it is larger than the sum of its proper divisors (603528296).

645150424 is a wasteful number, since it uses less digits than its factorization.

645150424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2601450 (or 2601446 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 645150424 is about 25399.8114953635. The cubic root of 645150424 is about 864.0794215686.

The spelling of 645150424 in words is "six hundred forty-five million, one hundred fifty thousand, four hundred twenty-four".