55178426865 has 16 divisors (see below), whose sum is σ = 88317758016. Its totient is φ = 29417736000.

The previous prime is 55178426861. The next prime is 55178426867. The reversal of 55178426865 is 56862487155.

It is not a de Polignac number, because 55178426865 - 2² = 55178426861 is a prime.

It is a super-3 number, since 3×55178426865³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (55178426861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 629911 + ... + 712140.

It is an arithmetic number, because the mean of its divisors is an integer number (5519859876).

Almost surely, 2^55178426865 is an apocalyptic number.

It is an amenable number.

55178426865 is a deficient number, since it is larger than the sum of its proper divisors (33139331151).

55178426865 is a wasteful number, since it uses less digits than its factorization.

55178426865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344800.

The product of its digits is 16128000, while the sum is 57.

The spelling of 55178426865 in words is "fifty-five billion, one hundred seventy-eight million, four hundred twenty-six thousand, eight hundred sixty-five".