645417610 has 8 divisors (see below), whose sum is σ = 1161751716. Its totient is φ = 258167040.

The previous prime is 645417607. The next prime is 645417611. The reversal of 645417610 is 16714546.

It can be written as a sum of positive squares in 2 ways, for example, as 628053721 + 17363889 = 25061^2 + 4167^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×645417610² = 833127782596224200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (645417611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32270871 + ... + 32270890.

Almost surely, 2^645417610 is an apocalyptic number.

645417610 is a deficient number, since it is larger than the sum of its proper divisors (516334106).

645417610 is a wasteful number, since it uses less digits than its factorization.

645417610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64541768.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 645417610 is about 25405.0705568790. The cubic root of 645417610 is about 864.1986899086.

The spelling of 645417610 in words is "six hundred forty-five million, four hundred seventeen thousand, six hundred ten".