645136624211601 has 8 divisors (see below), whose sum is σ = 860467845523104. Its totient is φ = 429948242853920.

The previous prime is 645136624211581. The next prime is 645136624211603. The reversal of 645136624211601 is 106112426631546.

645136624211601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 645136624211601 - 2¹⁰ = 645136624210577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (645136624211603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35709977916 + ... + 35709995981.

It is an arithmetic number, because the mean of its divisors is an integer number (107558480690388).

Almost surely, 2^{645136624211601} is an apocalyptic number.

It is an amenable number.

645136624211601 is a deficient number, since it is larger than the sum of its proper divisors (215331221311503).

645136624211601 is a wasteful number, since it uses less digits than its factorization.

645136624211601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71419976911.

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 645136624211601 in words is "six hundred forty-five trillion, one hundred thirty-six billion, six hundred twenty-four million, two hundred eleven thousand, six hundred one".