645110464523 has 8 divisors (see below), whose sum is σ = 747368679648. Its totient is φ = 545377143744.

The previous prime is 645110464501. The next prime is 645110464543. The reversal of 645110464523 is 325464011546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 645110464523 - 2¹⁶ = 645110398987 is a prime.

It is a super-2 number, since 2×645110464523² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645110464543) 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, 631223036 + ... + 631224057.

It is an arithmetic number, because the mean of its divisors is an integer number (93421084956).

Almost surely, 2^645110464523 is an apocalyptic number.

645110464523 is a deficient number, since it is larger than the sum of its proper divisors (102258215125).

645110464523 is a wasteful number, since it uses less digits than its factorization.

645110464523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262447173.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 645110464523 in words is "six hundred forty-five billion, one hundred ten million, four hundred sixty-four thousand, five hundred twenty-three".