55986381563 has 16 divisors (see below), whose sum is σ = 64961326080. Its totient is φ = 47259960000.

The previous prime is 55986381557. The next prime is 55986381593. The reversal of 55986381563 is 36518368955.

It is a cyclic number.

It is not a de Polignac number, because 55986381563 - 2¹⁰ = 55986380539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55986381553) 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 15 ways as a sum of consecutive naturals, for example, 22643 + ... + 335388.

It is an arithmetic number, because the mean of its divisors is an integer number (4060082880).

Almost surely, 2^55986381563 is an apocalyptic number.

55986381563 is a deficient number, since it is larger than the sum of its proper divisors (8974944517).

55986381563 is a wasteful number, since it uses less digits than its factorization.

55986381563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358378.

The product of its digits is 23328000, while the sum is 59.

The spelling of 55986381563 in words is "fifty-five billion, nine hundred eighty-six million, three hundred eighty-one thousand, five hundred sixty-three".