55278480123 has 24 divisors (see below), whose sum is σ = 84158539920. Its totient is φ = 34910191680.

The previous prime is 55278480113. The next prime is 55278480137. The reversal of 55278480123 is 32108487255.

55278480123 is a `hidden beast` number, since 552 + 7 + 8 + 4 + 80 + 12 + 3 = 666.

It is not a de Polignac number, because 55278480123 - 2¹⁷ = 55278349051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55278480113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1984233 + ... + 2011898.

It is an arithmetic number, because the mean of its divisors is an integer number (3506605830).

Almost surely, 2^55278480123 is an apocalyptic number.

55278480123 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

55278480123 is a deficient number, since it is larger than the sum of its proper divisors (28880059797).

55278480123 is a wasteful number, since it uses less digits than its factorization.

55278480123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3996219 (or 3996216 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The spelling of 55278480123 in words is "fifty-five billion, two hundred seventy-eight million, four hundred eighty thousand, one hundred twenty-three".