645840150 has 48 divisors (see below), whose sum is σ = 1656925200. Its totient is φ = 166284160.

The previous prime is 645840133. The next prime is 645840163. The reversal of 645840150 is 51048546.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69885 + ... + 78584.

It is an arithmetic number, because the mean of its divisors is an integer number (34519275).

Almost surely, 2^645840150 is an apocalyptic number.

645840150 is an abundant number, since it is smaller than the sum of its proper divisors (1011085050).

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

645840150 is a wasteful number, since it uses less digits than its factorization.

645840150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148513 (or 148508 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 645840150 is about 25413.3852526577. The cubic root of 645840150 is about 864.3872390747.

Adding to 645840150 its reverse (51048546), we get a palindrome (696888696).

The spelling of 645840150 in words is "six hundred forty-five million, eight hundred forty thousand, one hundred fifty".