645067144725 has 48 divisors (see below), whose sum is σ = 1085924526144. Its totient is φ = 337793472000.

The previous prime is 645067144723. The next prime is 645067144741. The reversal of 645067144725 is 527441760546.

It is not a de Polignac number, because 645067144725 - 2¹ = 645067144723 is a prime.

It is a super-2 number, since 2×645067144725² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645067144721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2450505 + ... + 2700945.

It is an arithmetic number, because the mean of its divisors is an integer number (22623427628).

Almost surely, 2^645067144725 is an apocalyptic number.

It is an amenable number.

645067144725 is a deficient number, since it is larger than the sum of its proper divisors (440857381419).

645067144725 is a wasteful number, since it uses less digits than its factorization.

645067144725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251078 (or 251073 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 51.

The spelling of 645067144725 in words is "six hundred forty-five billion, sixty-seven million, one hundred forty-four thousand, seven hundred twenty-five".