645032034 has 12 divisors (see below), whose sum is σ = 1397569446. Its totient is φ = 215010672.

The previous prime is 645032027. The next prime is 645032107. The reversal of 645032034 is 430230546.

645032034 is a `hidden beast` number, since 6 + 450 + 3 + 203 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 372683025 + 272349009 = 19305^2 + 16503^2 .

It is a junction number, because it is equal to n+sod(n) for n = 645031989 and 645032007.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17917539 + ... + 17917574.

Almost surely, 2^645032034 is an apocalyptic number.

645032034 is an abundant number, since it is smaller than the sum of its proper divisors (752537412).

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

645032034 is a wasteful number, since it uses less digits than its factorization.

645032034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35835121 (or 35835118 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 645032034 is about 25397.4808593293. The cubic root of 645032034 is about 864.0265632908.

The spelling of 645032034 in words is "six hundred forty-five million, thirty-two thousand, thirty-four".