645600561142 has 16 divisors (see below), whose sum is σ = 972735713280. Its totient is φ = 321356109928.

The previous prime is 645600561131. The next prime is 645600561161. The reversal of 645600561142 is 241165006546.

It is a junction number, because it is equal to n+sod(n) for n = 645600561095 and 645600561104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1462443 + ... + 1852009.

It is an arithmetic number, because the mean of its divisors is an integer number (60795982080).

Almost surely, 2^645600561142 is an apocalyptic number.

645600561142 is a deficient number, since it is larger than the sum of its proper divisors (327135152138).

645600561142 is a wasteful number, since it uses less digits than its factorization.

645600561142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393275.

The product of its (nonzero) digits is 172800, while the sum is 40.

Adding to 645600561142 its reverse (241165006546), we get a palindrome (886765567688).

The spelling of 645600561142 in words is "six hundred forty-five billion, six hundred million, five hundred sixty-one thousand, one hundred forty-two".