645234635111 has 16 divisors (see below), whose sum is σ = 707404766208. Its totient is φ = 583652563200.

The previous prime is 645234635107. The next prime is 645234635131. The reversal of 645234635111 is 111536432546.

It is a cyclic number.

It is not a de Polignac number, because 645234635111 - 2² = 645234635107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645234635131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4882496 + ... + 5012906.

It is an arithmetic number, because the mean of its divisors is an integer number (44212797888).

Almost surely, 2^645234635111 is an apocalyptic number.

645234635111 is a deficient number, since it is larger than the sum of its proper divisors (62170131097).

645234635111 is a wasteful number, since it uses less digits than its factorization.

645234635111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132662.

The product of its digits is 259200, while the sum is 41.

The spelling of 645234635111 in words is "six hundred forty-five billion, two hundred thirty-four million, six hundred thirty-five thousand, one hundred eleven".