645021410011 has 16 divisors (see below), whose sum is σ = 745733361888. Its totient is φ = 551384870400.

The previous prime is 645021409957. The next prime is 645021410021. The reversal of 645021410011 is 110014120546.

645021410011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 645021410011 - 2¹⁵ = 645021377243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645021410021) 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, 1373520 + ... + 1782301.

It is an arithmetic number, because the mean of its divisors is an integer number (46608335118).

Almost surely, 2^645021410011 is an apocalyptic number.

645021410011 is a deficient number, since it is larger than the sum of its proper divisors (100711951877).

645021410011 is a wasteful number, since it uses less digits than its factorization.

645021410011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3156942.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 645021410011 its reverse (110014120546), we get a palindrome (755035530557).

The spelling of 645021410011 in words is "six hundred forty-five billion, twenty-one million, four hundred ten thousand, eleven".