645472167 has 16 divisors (see below), whose sum is σ = 919622880. Its totient is φ = 401283072.

The previous prime is 645472153. The next prime is 645472189. The reversal of 645472167 is 761274546.

It is not a de Polignac number, because 645472167 - 2⁴ = 645472151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645472367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52498 + ... + 63615.

It is an arithmetic number, because the mean of its divisors is an integer number (57476430).

Almost surely, 2^645472167 is an apocalyptic number.

645472167 is a deficient number, since it is larger than the sum of its proper divisors (274150713).

645472167 is a wasteful number, since it uses less digits than its factorization.

645472167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116242.

The product of its digits is 282240, while the sum is 42.

The square root of 645472167 is about 25406.1442765328. The cubic root of 645472167 is about 864.2230393937.

The spelling of 645472167 in words is "six hundred forty-five million, four hundred seventy-two thousand, one hundred sixty-seven".