645436124 has 12 divisors (see below), whose sum is σ = 1129735824. Its totient is φ = 322654464.

The previous prime is 645436123. The next prime is 645436133. The reversal of 645436124 is 421634546.

645436124 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645436123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12617 + ... + 38079.

It is an arithmetic number, because the mean of its divisors is an integer number (94144652).

Almost surely, 2^645436124 is an apocalyptic number.

It is an amenable number.

645436124 is a deficient number, since it is larger than the sum of its proper divisors (484299700).

645436124 is a wasteful number, since it uses less digits than its factorization.

645436124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31804 (or 31802 counting only the distinct ones).

The product of its digits is 69120, while the sum is 35.

The square root of 645436124 is about 25405.4349303451. The cubic root of 645436124 is about 864.2069530968.

The spelling of 645436124 in words is "six hundred forty-five million, four hundred thirty-six thousand, one hundred twenty-four".