616561312 has 12 divisors (see below), whose sum is σ = 1213855146. Its totient is φ = 308280640.

The previous prime is 616561277. The next prime is 616561339. The reversal of 616561312 is 213165616.

It can be written as a sum of positive squares in only one way, i.e., 612859536 + 3701776 = 24756^2 + 1924^2 .

It is a super-2 number, since 2×616561312² = 760295702910322688, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 9633739 + ... + 9633802.

Almost surely, 2^616561312 is an apocalyptic number.

It is an amenable number.

616561312 is a deficient number, since it is larger than the sum of its proper divisors (597293834).

616561312 is a wasteful number, since it uses less digits than its factorization.

616561312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19267551 (or 19267543 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The square root of 616561312 is about 24830.6526696340. The cubic root of 616561312 is about 851.1225362685.

The spelling of 616561312 in words is "six hundred sixteen million, five hundred sixty-one thousand, three hundred twelve".