550555578081 has 48 divisors (see below), whose sum is σ = 836308392192. Its totient is φ = 348340608000.

The previous prime is 550555578077. The next prime is 550555578091. The reversal of 550555578081 is 180875555055.

550555578081 is a `hidden beast` number, since 5 + 5 + 0 + 5 + 5 + 557 + 8 + 0 + 81 = 666.

550555578081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 550555578081 - 2² = 550555578077 is a prime.

It is a super-2 number, since 2×550555578081² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (550555578091) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27527421 + ... + 27547413.

It is an arithmetic number, because the mean of its divisors is an integer number (17423091504).

Almost surely, 2^550555578081 is an apocalyptic number.

It is an amenable number.

550555578081 is a deficient number, since it is larger than the sum of its proper divisors (285752814111).

550555578081 is a wasteful number, since it uses less digits than its factorization.

550555578081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21054 (or 21051 counting only the distinct ones).

The product of its (nonzero) digits is 7000000, while the sum is 54.

The spelling of 550555578081 in words is "five hundred fifty billion, five hundred fifty-five million, five hundred seventy-eight thousand, eighty-one".