645164587810 has 16 divisors (see below), whose sum is σ = 1161336309696. Its totient is φ = 258056934768.

The previous prime is 645164587799. The next prime is 645164587829. The reversal of 645164587810 is 18785461546.

645164587810 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×645164587810² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 804024 + ... + 1391683.

It is an arithmetic number, because the mean of its divisors is an integer number (72583519356).

Almost surely, 2^645164587810 is an apocalyptic number.

645164587810 is a deficient number, since it is larger than the sum of its proper divisors (516171721886).

645164587810 is a wasteful number, since it uses less digits than its factorization.

645164587810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2225097.

The product of its (nonzero) digits is 6451200, while the sum is 55.

The spelling of 645164587810 in words is "six hundred forty-five billion, one hundred sixty-four million, five hundred eighty-seven thousand, eight hundred ten".