55220332455 has 48 divisors (see below), whose sum is σ = 99441276480. Its totient is φ = 28313101824.

The previous prime is 55220332379. The next prime is 55220332459. The reversal of 55220332455 is 55423302255.

55220332455 is a `hidden beast` number, since 55 + 220 + 332 + 4 + 55 = 666.

It is not a de Polignac number, because 55220332455 - 2¹⁰ = 55220331431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55220332459) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 213262 + ... + 394868.

It is an arithmetic number, because the mean of its divisors is an integer number (2071693260).

Almost surely, 2^55220332455 is an apocalyptic number.

55220332455 is a deficient number, since it is larger than the sum of its proper divisors (44220944025).

55220332455 is a wasteful number, since it uses less digits than its factorization.

55220332455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181880 (or 181877 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 36.

The spelling of 55220332455 in words is "fifty-five billion, two hundred twenty million, three hundred thirty-two thousand, four hundred fifty-five".