645066246211 has 16 divisors (see below), whose sum is σ = 653125068288. Its totient is φ = 637067894400.

The previous prime is 645066246131. The next prime is 645066246229. The reversal of 645066246211 is 112642660546.

It is a cyclic number.

It is not a de Polignac number, because 645066246211 - 2¹⁷ = 645066115139 is a prime.

It is a super-2 number, since 2×645066246211² (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 (645066246241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20880106 + ... + 20910976.

It is an arithmetic number, because the mean of its divisors is an integer number (40820316768).

Almost surely, 2^645066246211 is an apocalyptic number.

645066246211 is a deficient number, since it is larger than the sum of its proper divisors (8058822077).

645066246211 is a wasteful number, since it uses less digits than its factorization.

645066246211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31842.

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 645066246211 in words is "six hundred forty-five billion, sixty-six million, two hundred forty-six thousand, two hundred eleven".