39600655649 has 2 divisors, whose sum is σ = 39600655650. Its totient is φ = 39600655648.

The previous prime is 39600655537. The next prime is 39600655663. The reversal of 39600655649 is 94655600693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27247444624 + 12353211025 = 165068^2 + 111145^2 .

It is a cyclic number.

It is not a de Polignac number, because 39600655649 - 2¹² = 39600651553 is a prime.

It is a super-2 number, since 2×39600655649² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 39600655649.

It is not a weakly prime, because it can be changed into another prime (39600655949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19800327824 + 19800327825.

It is an arithmetic number, because the mean of its divisors is an integer number (19800327825).

Almost surely, 2^39600655649 is an apocalyptic number.

It is an amenable number.

39600655649 is a deficient number, since it is larger than the sum of its proper divisors (1).

39600655649 is an equidigital number, since it uses as much as digits as its factorization.

39600655649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5248800, while the sum is 53.

The spelling of 39600655649 in words is "thirty-nine billion, six hundred million, six hundred fifty-five thousand, six hundred forty-nine".