55770560 has 56 divisors (see below), whose sum is σ = 133441440. Its totient is φ = 22201344.

The previous prime is 55770497. The next prime is 55770563. The reversal of 55770560 is 6507755.

It is a super-2 number, since 2×55770560² = 6220710725427200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55770560.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55770563) 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, 126821 + ... + 127259.

Almost surely, 2^55770560 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 55770560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66720720).

55770560 is an abundant number, since it is smaller than the sum of its proper divisors (77670880).

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

55770560 is a wasteful number, since it uses less digits than its factorization.

55770560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853 (or 843 counting only the distinct ones).

The product of its (nonzero) digits is 36750, while the sum is 35.

The square root of 55770560 is about 7467.9689340543. The cubic root of 55770560 is about 382.0630178465.

It can be divided in two parts, 557 and 70560, that added together give a palindrome (71117).

The spelling of 55770560 in words is "fifty-five million, seven hundred seventy thousand, five hundred sixty".