645652434042 has 48 divisors (see below), whose sum is σ = 1744100085312. Its totient is φ = 167701930560.

The previous prime is 645652433917. The next prime is 645652434047. The reversal of 645652434042 is 240434256546.

It is a happy number.

645652434042 is a `hidden beast` number, since 6 + 4 + 56 + 524 + 34 + 0 + 42 = 666.

645652434042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (645652434047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 232917963 + ... + 232920734.

It is an arithmetic number, because the mean of its divisors is an integer number (36335418444).

Almost surely, 2^645652434042 is an apocalyptic number.

645652434042 is an abundant number, since it is smaller than the sum of its proper divisors (1098447651270).

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

645652434042 is a wasteful number, since it uses less digits than its factorization.

645652434042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465838723 (or 465838720 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 45.

The spelling of 645652434042 in words is "six hundred forty-five billion, six hundred fifty-two million, four hundred thirty-four thousand, forty-two".