55387278355 has 4 divisors (see below), whose sum is σ = 66464734032. Its totient is φ = 44309822680.

The previous prime is 55387278341. The next prime is 55387278407.

55387278355 is nontrivially palindromic in base 10.

55387278355 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55387278355 - 2²³ = 55378889747 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55387278355.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5538727831 + ... + 5538727840.

It is an arithmetic number, because the mean of its divisors is an integer number (16616183508).

Almost surely, 2^55387278355 is an apocalyptic number.

55387278355 is a deficient number, since it is larger than the sum of its proper divisors (11077455677).

55387278355 is a wasteful number, since it uses less digits than its factorization.

55387278355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11077455676.

The product of its digits is 35280000, while the sum is 58.

The spelling of 55387278355 in words is "fifty-five billion, three hundred eighty-seven million, two hundred seventy-eight thousand, three hundred fifty-five".