645452170 has 16 divisors (see below), whose sum is σ = 1267433568. Its totient is φ = 234709840.

The previous prime is 645452131. The next prime is 645452177. The reversal of 645452170 is 71254546.

It is not an unprimeable number, because it can be changed into a prime (645452177) 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, 2933764 + ... + 2933983.

It is an arithmetic number, because the mean of its divisors is an integer number (79214598).

Almost surely, 2^645452170 is an apocalyptic number.

645452170 is a deficient number, since it is larger than the sum of its proper divisors (621981398).

645452170 is a wasteful number, since it uses less digits than its factorization.

645452170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5867765.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 645452170 is about 25405.7507269516. The cubic root of 645452170 is about 864.2141146368.

The spelling of 645452170 in words is "six hundred forty-five million, four hundred fifty-two thousand, one hundred seventy".