645307626703546 has 16 divisors (see below), whose sum is σ = 981739500575040. Its totient is φ = 318062467260160.

The previous prime is 645307626703541. The next prime is 645307626703567.

645307626703546 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (645307626703541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334221031 + ... + 336146266.

It is an arithmetic number, because the mean of its divisors is an integer number (61358718785940).

Almost surely, 2^{645307626703546} is an apocalyptic number.

645307626703546 is a deficient number, since it is larger than the sum of its proper divisors (336431873871494).

645307626703546 is a wasteful number, since it uses less digits than its factorization.

645307626703546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670374149.

The product of its (nonzero) digits is 457228800, while the sum is 64.

The spelling of 645307626703546 in words is "six hundred forty-five trillion, three hundred seven billion, six hundred twenty-six million, seven hundred three thousand, five hundred forty-six".