55581000616 has 8 divisors (see below), whose sum is σ = 104214376170. Its totient is φ = 27790500304.

The previous prime is 55581000613. The next prime is 55581000703. The reversal of 55581000616 is 61600018555.

It can be written as a sum of positive squares in only one way, i.e., 49457312100 + 6123688516 = 222390^2 + 78254^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (55581000613) 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 as a sum of consecutive naturals, namely, 3473812531 + ... + 3473812546.

Almost surely, 2^55581000616 is an apocalyptic number.

It is an amenable number.

55581000616 is a deficient number, since it is larger than the sum of its proper divisors (48633375554).

55581000616 is a wasteful number, since it uses less digits than its factorization.

55581000616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6947625083 (or 6947625079 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 37.

The spelling of 55581000616 in words is "fifty-five billion, five hundred eighty-one million, six hundred sixteen", and thus it is an aban number.