55616061505 has 24 divisors (see below), whose sum is σ = 68616862272. Its totient is φ = 43274352000.

The previous prime is 55616061499. The next prime is 55616061509. The reversal of 55616061505 is 50516061655.

It is not a de Polignac number, because 55616061505 - 2⁹ = 55616060993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55616061509) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 2772060 + ... + 2792050.

It is an arithmetic number, because the mean of its divisors is an integer number (2859035928).

Almost surely, 2^55616061505 is an apocalyptic number.

It is an amenable number.

55616061505 is a deficient number, since it is larger than the sum of its proper divisors (13000800767).

55616061505 is a wasteful number, since it uses less digits than its factorization.

55616061505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20409 (or 20368 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 55616061505 in words is "fifty-five billion, six hundred sixteen million, sixty-one thousand, five hundred five".