55105478211 has 32 divisors (see below), whose sum is σ = 87660269568. Its totient is φ = 30106311840.

The previous prime is 55105478191. The next prime is 55105478227. The reversal of 55105478211 is 11287450155.

55105478211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55105478211 - 2⁹ = 55105477699 is a prime.

It is a super-2 number, since 2×55105478211² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55105478211.

It is not an unprimeable number, because it can be changed into a prime (55105478411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1109296 + ... + 1157906.

It is an arithmetic number, because the mean of its divisors is an integer number (2739383424).

Almost surely, 2^55105478211 is an apocalyptic number.

55105478211 is a deficient number, since it is larger than the sum of its proper divisors (32554791357).

55105478211 is a wasteful number, since it uses less digits than its factorization.

55105478211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50991.

The product of its (nonzero) digits is 56000, while the sum is 39.

The spelling of 55105478211 in words is "fifty-five billion, one hundred five million, four hundred seventy-eight thousand, two hundred eleven".