55590637568 has 104 divisors (see below), whose sum is σ = 120893852232. Its totient is φ = 25452085248.

The previous prime is 55590637567. The next prime is 55590637579. The reversal of 55590637568 is 86573609555.

It can be written as a sum of positive squares in 4 ways, for example, as 37406654464 + 18183983104 = 193408^2 + 134848^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55590637567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2565596 + ... + 2587172.

Almost surely, 2^55590637568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55590637568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60446926116).

55590637568 is an abundant number, since it is smaller than the sum of its proper divisors (65303214664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55590637568 is a wasteful number, since it uses less digits than its factorization.

55590637568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21655 (or 21633 counting only the distinct ones).

The product of its (nonzero) digits is 34020000, while the sum is 59.

The spelling of 55590637568 in words is "fifty-five billion, five hundred ninety million, six hundred thirty-seven thousand, five hundred sixty-eight".