555001001000 has 128 divisors (see below), whose sum is σ = 1392851116800. Its totient is φ = 206347564800.

The previous prime is 555001000963. The next prime is 555001001029. The reversal of 555001001000 is 100100555.

It is a super-2 number, since 2×555001001000² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 555001001000.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 731429 + ... + 1282571.

It is an arithmetic number, because the mean of its divisors is an integer number (10881649350).

Almost surely, 2^555001001000 is an apocalyptic number.

555001001000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 555001001000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (696425558400).

555001001000 is an abundant number, since it is smaller than the sum of its proper divisors (837850115800).

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

555001001000 is a wasteful number, since it uses less digits than its factorization.

555001001000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551236 (or 551222 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 17.

Adding to 555001001000 its reverse (100100555), we get a palindrome (555101101555).

The spelling of 555001001000 in words is "five hundred fifty-five billion, one million, one thousand".