551011133461 has 4 divisors (see below), whose sum is σ = 560044102924. Its totient is φ = 541978164000.

The previous prime is 551011133447. The next prime is 551011133509. The reversal of 551011133461 is 164331110155.

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 199250640625 + 351760492836 = 446375^2 + 593094^2 .

It is a cyclic number.

It is not a de Polignac number, because 551011133461 - 2⁵ = 551011133429 is a prime.

It is a super-2 number, since 2×551011133461² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551011133161) 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, 4516484640 + ... + 4516484761.

It is an arithmetic number, because the mean of its divisors is an integer number (140011025731).

Almost surely, 2^551011133461 is an apocalyptic number.

It is an amenable number.

551011133461 is a deficient number, since it is larger than the sum of its proper divisors (9032969463).

551011133461 is an equidigital number, since it uses as much as digits as its factorization.

551011133461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9032969462.

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 551011133461 in words is "five hundred fifty-one billion, eleven million, one hundred thirty-three thousand, four hundred sixty-one".