645014871 has 12 divisors (see below), whose sum is σ = 932694672. Its totient is φ = 429545376.

The previous prime is 645014863. The next prime is 645014957. The reversal of 645014871 is 178410546.

It is a happy number.

645014871 is a `hidden beast` number, since 645 + 0 + 1 + 4 + 8 + 7 + 1 = 666.

645014871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 645014871 - 2³ = 645014863 is a prime.

It is a super-2 number, since 2×645014871² = 832088367622293282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645014801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29811 + ... + 46676.

It is an arithmetic number, because the mean of its divisors is an integer number (77724556).

Almost surely, 2^645014871 is an apocalyptic number.

645014871 is a deficient number, since it is larger than the sum of its proper divisors (287679801).

645014871 is a wasteful number, since it uses less digits than its factorization.

645014871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77430 (or 77427 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 645014871 is about 25397.1429692397. The cubic root of 645014871 is about 864.0188998888.

It can be divided in two parts, 6450 and 14871, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 645014871 in words is "six hundred forty-five million, fourteen thousand, eight hundred seventy-one".