645010620 has 48 divisors (see below), whose sum is σ = 1884556800. Its totient is φ = 164524096.

The previous prime is 645010607. The next prime is 645010631. The reversal of 645010620 is 26010546.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232320 + ... + 235079.

It is an arithmetic number, because the mean of its divisors is an integer number (39261600).

Almost surely, 2^645010620 is an apocalyptic number.

645010620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

645010620 is an abundant number, since it is smaller than the sum of its proper divisors (1239546180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645010620 is a wasteful number, since it uses less digits than its factorization.

645010620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467434 (or 467432 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 645010620 is about 25397.0592785858. The cubic root of 645010620 is about 864.0170017659.

The spelling of 645010620 in words is "six hundred forty-five million, ten thousand, six hundred twenty".