55355778533 has 6 divisors (see below), whose sum is σ = 60845607942. Its totient is φ = 50323434920.

The previous prime is 55355778509. The next prime is 55355778547. The reversal of 55355778533 is 33587755355.

It can be written as a sum of positive squares in only one way, i.e., 51557151844 + 3798626689 = 227062^2 + 61633^2 .

It is not a de Polignac number, because 55355778533 - 2⁶ = 55355778469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55355778833) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 228742766 + ... + 228743007.

It is an arithmetic number, because the mean of its divisors is an integer number (10140934657).

Almost surely, 2^55355778533 is an apocalyptic number.

It is an amenable number.

55355778533 is a deficient number, since it is larger than the sum of its proper divisors (5489829409).

55355778533 is a wasteful number, since it uses less digits than its factorization.

55355778533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457485795 (or 457485784 counting only the distinct ones).

The product of its digits is 33075000, while the sum is 56.

The spelling of 55355778533 in words is "fifty-five billion, three hundred fifty-five million, seven hundred seventy-eight thousand, five hundred thirty-three".