645310263335126 has 16 divisors (see below), whose sum is σ = 971521622521200. Its totient is φ = 321469870619040.

The previous prime is 645310263335107. The next prime is 645310263335183. The reversal of 645310263335126 is 621533362013546.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28308101 + ... + 45738048.

It is an arithmetic number, because the mean of its divisors is an integer number (60720101407575).

Almost surely, 2^{645310263335126} is an apocalyptic number.

645310263335126 is a deficient number, since it is larger than the sum of its proper divisors (326211359186074).

645310263335126 is a wasteful number, since it uses less digits than its factorization.

645310263335126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74062159.

The product of its (nonzero) digits is 6998400, while the sum is 50.

The spelling of 645310263335126 in words is "six hundred forty-five trillion, three hundred ten billion, two hundred sixty-three million, three hundred thirty-five thousand, one hundred twenty-six".