551255564278 has 8 divisors (see below), whose sum is σ = 838210515768. Its totient is φ = 271852059024.

The previous prime is 551255564273. The next prime is 551255564311. The reversal of 551255564278 is 872465552155.

551255564278 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×551255564278³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551255564273) 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, 1887861376 + ... + 1887861667.

It is an arithmetic number, because the mean of its divisors is an integer number (104776314471).

Almost surely, 2^551255564278 is an apocalyptic number.

551255564278 is a deficient number, since it is larger than the sum of its proper divisors (286954951490).

551255564278 is a wasteful number, since it uses less digits than its factorization.

551255564278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3775723118.

The product of its digits is 16800000, while the sum is 55.

The spelling of 551255564278 in words is "five hundred fifty-one billion, two hundred fifty-five million, five hundred sixty-four thousand, two hundred seventy-eight".