645352888253546 has 16 divisors (see below), whose sum is σ = 1056396525125760. Its totient is φ = 293240964665280.

The previous prime is 645352888253539. The next prime is 645352888253561.

645352888253546 is nontrivially palindromic in base 10.

It is a Curzon number.

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, 5062798226 + ... + 5062925693.

It is an arithmetic number, because the mean of its divisors is an integer number (66024782820360).

Almost surely, 2^{645352888253546} is an apocalyptic number.

645352888253546 is a deficient number, since it is larger than the sum of its proper divisors (411043636872214).

645352888253546 is a wasteful number, since it uses less digits than its factorization.

645352888253546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10125726829.

The product of its digits is 6635520000, while the sum is 74.

The spelling of 645352888253546 in words is "six hundred forty-five trillion, three hundred fifty-two billion, eight hundred eighty-eight million, two hundred fifty-three thousand, five hundred forty-six".