55811657278 has 8 divisors (see below), whose sum is σ = 90157292568. Its totient is φ = 25759226424.

The previous prime is 55811657273. The next prime is 55811657299. The reversal of 55811657278 is 87275611855.

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

It is a super-2 number, since 2×55811657278² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55811657273) 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, 1073301076 + ... + 1073301127.

It is an arithmetic number, because the mean of its divisors is an integer number (11269661571).

Almost surely, 2^55811657278 is an apocalyptic number.

55811657278 is a deficient number, since it is larger than the sum of its proper divisors (34345635290).

55811657278 is a wasteful number, since it uses less digits than its factorization.

55811657278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2146602218.

The product of its digits is 4704000, while the sum is 55.

The spelling of 55811657278 in words is "fifty-five billion, eight hundred eleven million, six hundred fifty-seven thousand, two hundred seventy-eight".