55567764 has 162 divisors, whose sum is σ = 175164990. Its totient is φ = 14805504.

The previous prime is 55567763. The next prime is 55567777. The reversal of 55567764 is 46776555.

It can be written as a sum of positive squares in 3 ways, for example, as 28005264 + 27562500 = 5292^2 + 5250^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55567763) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 509742 + ... + 509850.

Almost surely, 2^55567764 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 55567764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87582495).

55567764 is an abundant number, since it is smaller than the sum of its proper divisors (119597226).

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

55567764 is a wasteful number, since it uses less digits than its factorization.

55567764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 138 counting only the distinct ones).

The product of its digits is 882000, while the sum is 45.

The square root of 55567764 is about 7454.3788473621. The cubic root of 55567764 is about 381.5993624978.

The spelling of 55567764 in words is "fifty-five million, five hundred sixty-seven thousand, seven hundred sixty-four".