645832104 has 16 divisors (see below), whose sum is σ = 1614580320. Its totient is φ = 215277360.

The previous prime is 645832081. The next prime is 645832127. The reversal of 645832104 is 401238546.

It is an interprime number because it is at equal distance from previous prime (645832081) and next prime (645832127).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13454812 + ... + 13454859.

It is an arithmetic number, because the mean of its divisors is an integer number (100911270).

Almost surely, 2^645832104 is an apocalyptic number.

It is an amenable number.

645832104 is an abundant number, since it is smaller than the sum of its proper divisors (968748216).

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

645832104 is a wasteful number, since it uses less digits than its factorization.

645832104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26909680 (or 26909676 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 645832104 is about 25413.2269497598. The cubic root of 645832104 is about 864.3836494927.

The spelling of 645832104 in words is "six hundred forty-five million, eight hundred thirty-two thousand, one hundred four".