55280505555 has 24 divisors (see below), whose sum is σ = 104530411440. Its totient is φ = 26802669120.

The previous prime is 55280505481. The next prime is 55280505559. The reversal of 55280505555 is 55550508255.

It is not a de Polignac number, because 55280505555 - 2⁸ = 55280505299 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 55280505555.

It is not an unprimeable number, because it can be changed into a prime (55280505559) 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, 55838400 + ... + 55839389.

It is an arithmetic number, because the mean of its divisors is an integer number (4355433810).

Almost surely, 2^55280505555 is an apocalyptic number.

55280505555 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55280505555 is a deficient number, since it is larger than the sum of its proper divisors (49249905885).

55280505555 is a wasteful number, since it uses less digits than its factorization.

55280505555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111677811 (or 111677808 counting only the distinct ones).

The product of its (nonzero) digits is 1250000, while the sum is 45.

The spelling of 55280505555 in words is "fifty-five billion, two hundred eighty million, five hundred five thousand, five hundred fifty-five".