645055186074353 has 4 divisors (see below), whose sum is σ = 645055881349488. Its totient is φ = 645054490799220.

The previous prime is 645055186074107. The next prime is 645055186074359. The reversal of 645055186074353 is 353470681550546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 645055186074353 - 2¹² = 645055186070257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645055186074359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346244051 + ... + 348102072.

It is an arithmetic number, because the mean of its divisors is an integer number (161263970337372).

Almost surely, 2^{645055186074353} is an apocalyptic number.

It is an amenable number.

645055186074353 is a deficient number, since it is larger than the sum of its proper divisors (695275135).

645055186074353 is an equidigital number, since it uses as much as digits as its factorization.

645055186074353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695275134.

The product of its (nonzero) digits is 181440000, while the sum is 62.

The spelling of 645055186074353 in words is "six hundred forty-five trillion, fifty-five billion, one hundred eighty-six million, seventy-four thousand, three hundred fifty-three".