55561100006978 has 32 divisors (see below), whose sum is σ = 85873981600512. Its totient is φ = 26944392092800.

The previous prime is 55561100006977. The next prime is 55561100007121. The reversal of 55561100006978 is 87960000116555.

It is not an unprimeable number, because it can be changed into a prime (55561100006977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210260525 + ... + 210524607.

It is an arithmetic number, because the mean of its divisors is an integer number (2683561925016).

Almost surely, 2^{55561100006978} is an apocalyptic number.

55561100006978 is a deficient number, since it is larger than the sum of its proper divisors (30312881593534).

55561100006978 is a wasteful number, since it uses less digits than its factorization.

55561100006978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279130.

The product of its (nonzero) digits is 2268000, while the sum is 53.

The spelling of 55561100006978 in words is "fifty-five trillion, five hundred sixty-one billion, one hundred million, six thousand, nine hundred seventy-eight".