645105111502 has 16 divisors (see below), whose sum is σ = 968975937792. Its totient is φ = 322113428280.

The previous prime is 645105111461. The next prime is 645105111527. The reversal of 645105111502 is 205111501546.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 4376283 + ... + 4521289.

It is an arithmetic number, because the mean of its divisors is an integer number (60560996112).

Almost surely, 2^645105111502 is an apocalyptic number.

645105111502 is a deficient number, since it is larger than the sum of its proper divisors (323870826290).

645105111502 is a wasteful number, since it uses less digits than its factorization.

645105111502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148023.

The product of its (nonzero) digits is 6000, while the sum is 31.

The spelling of 645105111502 in words is "six hundred forty-five billion, one hundred five million, one hundred eleven thousand, five hundred two".