645415253266011 has 16 divisors (see below), whose sum is σ = 868909860988416. Its totient is φ = 426098753027136.

The previous prime is 645415253265997. The next prime is 645415253266027. The reversal of 645415253266011 is 110662352514546.

It is not a de Polignac number, because 645415253266011 - 2³¹ = 645413105782363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (645415253266811) 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, 298254226 + ... + 300410408.

It is an arithmetic number, because the mean of its divisors is an integer number (54306866311776).

Almost surely, 2^{645415253266011} is an apocalyptic number.

645415253266011 is a deficient number, since it is larger than the sum of its proper divisors (223494607722405).

645415253266011 is a wasteful number, since it uses less digits than its factorization.

645415253266011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3125002.

The product of its (nonzero) digits is 5184000, while the sum is 51.

The spelling of 645415253266011 in words is "six hundred forty-five trillion, four hundred fifteen billion, two hundred fifty-three million, two hundred sixty-six thousand, eleven".