645701420145 has 8 divisors (see below), whose sum is σ = 1033122272256. Its totient is φ = 344374090736.

The previous prime is 645701420093. The next prime is 645701420167. The reversal of 645701420145 is 541024107546.

645701420145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 645701420145 - 2⁶ = 645701420081 is a prime.

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, 21523380657 + ... + 21523380686.

It is an arithmetic number, because the mean of its divisors is an integer number (129140284032).

Almost surely, 2^645701420145 is an apocalyptic number.

It is an amenable number.

645701420145 is a deficient number, since it is larger than the sum of its proper divisors (387420852111).

645701420145 is a wasteful number, since it uses less digits than its factorization.

645701420145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43046761351.

The product of its (nonzero) digits is 134400, while the sum is 39.

The spelling of 645701420145 in words is "six hundred forty-five billion, seven hundred one million, four hundred twenty thousand, one hundred forty-five".