645062677745 has 8 divisors (see below), whose sum is σ = 774357635880. Its totient is φ = 515861860480.

The previous prime is 645062677711. The next prime is 645062677759. The reversal of 645062677745 is 547776260546.

645062677745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 160891638769 + 484171038976 = 401113^2 + 695824^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 645062677745 - 2³² = 640767710449 is a prime.

It is a super-2 number, since 2×645062677745² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23520140 + ... + 23547549.

It is an arithmetic number, because the mean of its divisors is an integer number (96794704485).

Almost surely, 2^645062677745 is an apocalyptic number.

It is an amenable number.

645062677745 is a deficient number, since it is larger than the sum of its proper divisors (129294958135).

645062677745 is a wasteful number, since it uses less digits than its factorization.

645062677745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47070435.

The product of its (nonzero) digits is 59270400, while the sum is 59.

The spelling of 645062677745 in words is "six hundred forty-five billion, sixty-two million, six hundred seventy-seven thousand, seven hundred forty-five".