645226200652 has 48 divisors (see below), whose sum is σ = 1245653418240. Its totient is φ = 289996200000.

The previous prime is 645226200649. The next prime is 645226200677. The reversal of 645226200652 is 256002622546.

It is a happy 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, 2197527 + ... + 2473777.

It is an arithmetic number, because the mean of its divisors is an integer number (25951112880).

Almost surely, 2^645226200652 is an apocalyptic number.

It is an amenable number.

645226200652 is a deficient number, since it is larger than the sum of its proper divisors (600427217588).

645226200652 is a wasteful number, since it uses less digits than its factorization.

645226200652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276862 (or 276860 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 645226200652 in words is "six hundred forty-five billion, two hundred twenty-six million, two hundred thousand, six hundred fifty-two".