55776178112860 has 12 divisors (see below), whose sum is σ = 117129974037048. Its totient is φ = 22310471245136.

The previous prime is 55776178112857. The next prime is 55776178112867. The reversal of 55776178112860 is 6821187167755.

It is a happy number.

It is a super-2 number, since 2×55776178112860² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55776178112792 and 55776178112801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55776178112867) 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, 1394404452802 + ... + 1394404452841.

It is an arithmetic number, because the mean of its divisors is an integer number (9760831169754).

Almost surely, 2^{55776178112860} is an apocalyptic number.

It is an amenable number.

55776178112860 is an abundant number, since it is smaller than the sum of its proper divisors (61353795924188).

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

55776178112860 is a wasteful number, since it uses less digits than its factorization.

55776178112860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2788808905652 (or 2788808905650 counting only the distinct ones).

The product of its (nonzero) digits is 39513600, while the sum is 64.

The spelling of 55776178112860 in words is "fifty-five trillion, seven hundred seventy-six billion, one hundred seventy-eight million, one hundred twelve thousand, eight hundred sixty".