645632213235 has 16 divisors (see below), whose sum is σ = 1033553281536. Its totient is φ = 344156600288.

The previous prime is 645632213231. The next prime is 645632213263. The reversal of 645632213235 is 532312236546.

645632213235 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 645632213235 - 2² = 645632213231 is a prime.

It is not an unprimeable number, because it can be changed into a prime (645632213231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11256699 + ... + 11313908.

It is an arithmetic number, because the mean of its divisors is an integer number (64597080096).

Almost surely, 2^645632213235 is an apocalyptic number.

645632213235 is a deficient number, since it is larger than the sum of its proper divisors (387921068301).

645632213235 is a wasteful number, since it uses less digits than its factorization.

645632213235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22572522.

The product of its digits is 777600, while the sum is 42.

The spelling of 645632213235 in words is "six hundred forty-five billion, six hundred thirty-two million, two hundred thirteen thousand, two hundred thirty-five".