645058670 has 16 divisors (see below), whose sum is σ = 1161594000. Its totient is φ = 257914944.

The previous prime is 645058649. The next prime is 645058723. The reversal of 645058670 is 76850546.

645058670 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×645058670² = 832201375484337800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14081 + ... + 38579.

It is an arithmetic number, because the mean of its divisors is an integer number (72599625).

Almost surely, 2^645058670 is an apocalyptic number.

645058670 is a deficient number, since it is larger than the sum of its proper divisors (516535330).

645058670 is a wasteful number, since it uses less digits than its factorization.

645058670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27139.

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 645058670 is about 25398.0052366323. The cubic root of 645058670 is about 864.0384561858.

The spelling of 645058670 in words is "six hundred forty-five million, fifty-eight thousand, six hundred seventy".