645454165610 has 16 divisors (see below), whose sum is σ = 1163133275616. Its totient is φ = 257889271248.

The previous prime is 645454165589. The next prime is 645454165693. The reversal of 645454165610 is 16561454546.

It is a super-2 number, since 2×645454165610² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36540104 + ... + 36557763.

It is an arithmetic number, because the mean of its divisors is an integer number (72695829726).

Almost surely, 2^645454165610 is an apocalyptic number.

645454165610 is a deficient number, since it is larger than the sum of its proper divisors (517679110006).

645454165610 is a wasteful number, since it uses less digits than its factorization.

645454165610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73098757.

The product of its (nonzero) digits is 1728000, while the sum is 47.

The spelling of 645454165610 in words is "six hundred forty-five billion, four hundred fifty-four million, one hundred sixty-five thousand, six hundred ten".