55678016838 has 8 divisors (see below), whose sum is σ = 111356033688. Its totient is φ = 18559338944.

The previous prime is 55678016833. The next prime is 55678016839. The reversal of 55678016838 is 83861087655.

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

55678016838 is an admirable number.

It is a super-2 number, since 2×55678016838² (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 (55678016831) 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, 4639834731 + ... + 4639834742.

It is an arithmetic number, because the mean of its divisors is an integer number (13919504211).

Almost surely, 2^55678016838 is an apocalyptic number.

55678016838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

55678016838 is a wasteful number, since it uses less digits than its factorization.

55678016838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9279669478.

The product of its (nonzero) digits is 9676800, while the sum is 57.

The spelling of 55678016838 in words is "fifty-five billion, six hundred seventy-eight million, sixteen thousand, eight hundred thirty-eight".