645063700273 has 16 divisors (see below), whose sum is σ = 689386965120. Its totient is φ = 601846592256.

The previous prime is 645063700249. The next prime is 645063700279. The reversal of 645063700273 is 372007360546.

645063700273 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 a de Polignac number, because none of the positive numbers 2^k-645063700273 is a prime.

It is a super-2 number, since 2×645063700273² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (645063700279) 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, 619765 + ... + 1293922.

It is an arithmetic number, because the mean of its divisors is an integer number (43086685320).

Almost surely, 2^645063700273 is an apocalyptic number.

It is an amenable number.

645063700273 is a deficient number, since it is larger than the sum of its proper divisors (44323264847).

645063700273 is a wasteful number, since it uses less digits than its factorization.

645063700273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913976.

The product of its (nonzero) digits is 635040, while the sum is 43.

The spelling of 645063700273 in words is "six hundred forty-five billion, sixty-three million, seven hundred thousand, two hundred seventy-three".