645622704555 has 32 divisors (see below), whose sum is σ = 1087845292800. Its totient is φ = 326065145472.

The previous prime is 645622704527. The next prime is 645622704563. The reversal of 645622704555 is 555407226546.

It is not a de Polignac number, because 645622704555 - 2¹⁵ = 645622671787 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 645622704498 and 645622704507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146461 + ... + 1145729.

It is an arithmetic number, because the mean of its divisors is an integer number (33995165400).

Almost surely, 2^645622704555 is an apocalyptic number.

645622704555 is a deficient number, since it is larger than the sum of its proper divisors (442222588245).

645622704555 is a wasteful number, since it uses less digits than its factorization.

645622704555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001563.

The product of its (nonzero) digits is 10080000, while the sum is 51.

The spelling of 645622704555 in words is "six hundred forty-five billion, six hundred twenty-two million, seven hundred four thousand, five hundred fifty-five".