645415523320535 has 64 divisors (see below), whose sum is σ = 932986640646144. Its totient is φ = 423123189350400.

The previous prime is 645415523320523. The next prime is 645415523320541. The reversal of 645415523320535 is 535023325514546.

It is not a de Polignac number, because 645415523320535 - 2⁶ = 645415523320471 is a prime.

It is a super-2 number, since 2×645415523320535² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 111967967 + ... + 117591056.

It is an arithmetic number, because the mean of its divisors is an integer number (14577916260096).

Almost surely, 2^{645415523320535} is an apocalyptic number.

645415523320535 is a deficient number, since it is larger than the sum of its proper divisors (287571117325609).

645415523320535 is a wasteful number, since it uses less digits than its factorization.

645415523320535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229559184.

The product of its (nonzero) digits is 32400000, while the sum is 53.

The spelling of 645415523320535 in words is "six hundred forty-five trillion, four hundred fifteen billion, five hundred twenty-three million, three hundred twenty thousand, five hundred thirty-five".