645164151 has 16 divisors (see below), whose sum is σ = 886152960. Its totient is φ = 417260480.

The previous prime is 645164147. The next prime is 645164167. The reversal of 645164151 is 151461546.

It is a cyclic number.

It is not a de Polignac number, because 645164151 - 2² = 645164147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645164101) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7366 + ... + 36668.

It is an arithmetic number, because the mean of its divisors is an integer number (55384560).

Almost surely, 2^645164151 is an apocalyptic number.

645164151 is a deficient number, since it is larger than the sum of its proper divisors (240988809).

645164151 is a wasteful number, since it uses less digits than its factorization.

645164151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29526.

The product of its digits is 14400, while the sum is 33.

The square root of 645164151 is about 25400.0817124670. The cubic root of 645164151 is about 864.0855499244.

The spelling of 645164151 in words is "six hundred forty-five million, one hundred sixty-four thousand, one hundred fifty-one".