555005504991 has 12 divisors (see below), whose sum is σ = 860824865112. Its totient is φ = 317146002768.

The previous prime is 555005504959. The next prime is 555005505023. The reversal of 555005504991 is 199405500555.

It is an interprime number because it is at equal distance from previous prime (555005504959) and next prime (555005505023).

It is not a de Polignac number, because 555005504991 - 2⁵ = 555005504959 is a prime.

It is a super-2 number, since 2×555005504991² (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 555005504991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555005504791) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1887773680 + ... + 1887773973.

It is an arithmetic number, because the mean of its divisors is an integer number (71735405426).

Almost surely, 2^555005504991 is an apocalyptic number.

555005504991 is a deficient number, since it is larger than the sum of its proper divisors (305819360121).

555005504991 is a wasteful number, since it uses less digits than its factorization.

555005504991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3775547670 (or 3775547663 counting only the distinct ones).

The product of its (nonzero) digits is 1012500, while the sum is 48.

The spelling of 555005504991 in words is "five hundred fifty-five billion, five million, five hundred four thousand, nine hundred ninety-one".