645451546502 has 16 divisors (see below), whose sum is σ = 1114934844672. Its totient is φ = 274510471560.

The previous prime is 645451546477. The next prime is 645451546517. The reversal of 645451546502 is 205645154546.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175966418 + ... + 175970085.

It is an arithmetic number, because the mean of its divisors is an integer number (69683427792).

Almost surely, 2^645451546502 is an apocalyptic number.

645451546502 is a deficient number, since it is larger than the sum of its proper divisors (469483298170).

645451546502 is a wasteful number, since it uses less digits than its factorization.

645451546502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351936643.

The product of its (nonzero) digits is 2880000, while the sum is 47.

The spelling of 645451546502 in words is "six hundred forty-five billion, four hundred fifty-one million, five hundred forty-six thousand, five hundred two".