645129435 has 16 divisors (see below), whose sum is σ = 1032961824. Its totient is φ = 343817472.

The previous prime is 645129421. The next prime is 645129467. The reversal of 645129435 is 534921546.

It is not a de Polignac number, because 645129435 - 2⁵ = 645129403 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 645129393 and 645129402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6489 + ... + 36501.

It is an arithmetic number, because the mean of its divisors is an integer number (64560114).

Almost surely, 2^645129435 is an apocalyptic number.

645129435 is a deficient number, since it is larger than the sum of its proper divisors (387832389).

645129435 is a wasteful number, since it uses less digits than its factorization.

645129435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31454.

The product of its digits is 129600, while the sum is 39.

The square root of 645129435 is about 25399.3983196453. The cubic root of 645129435 is about 864.0700509582.

The spelling of 645129435 in words is "six hundred forty-five million, one hundred twenty-nine thousand, four hundred thirty-five".