550555555001 has 4 divisors (see below), whose sum is σ = 550557578532. Its totient is φ = 550553531472.

The previous prime is 550555554979. The next prime is 550555555031. The reversal of 550555555001 is 100555555055.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 143926149376 + 406629405625 = 379376^2 + 637675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-550555555001 is a prime.

It is a super-2 number, since 2×550555555001² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 550555555001.

It is not an unprimeable number, because it can be changed into a prime (550555555031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 525866 + ... + 1173731.

It is an arithmetic number, because the mean of its divisors is an integer number (137639394633).

Almost surely, 2^550555555001 is an apocalyptic number.

It is an amenable number.

550555555001 is a deficient number, since it is larger than the sum of its proper divisors (2023531).

550555555001 is a wasteful number, since it uses less digits than its factorization.

550555555001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2023530.

The product of its (nonzero) digits is 390625, while the sum is 41.

The spelling of 550555555001 in words is "five hundred fifty billion, five hundred fifty-five million, five hundred fifty-five thousand, one".