645831306001 has 4 divisors (see below), whose sum is σ = 738092921152. Its totient is φ = 553569690852.

The previous prime is 645831305927. The next prime is 645831306013. The reversal of 645831306001 is 100603138546.

645831306001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 645831306001 - 2¹⁵ = 645831273233 is a prime.

It is a super-2 number, since 2×645831306001² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645831316001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46130807565 + ... + 46130807578.

It is an arithmetic number, because the mean of its divisors is an integer number (184523230288).

Almost surely, 2^645831306001 is an apocalyptic number.

It is an amenable number.

645831306001 is a deficient number, since it is larger than the sum of its proper divisors (92261615151).

645831306001 is an equidigital number, since it uses as much as digits as its factorization.

645831306001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92261615150.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 645831306001 in words is "six hundred forty-five billion, eight hundred thirty-one million, three hundred six thousand, one".