55455120405 has 48 divisors (see below), whose sum is σ = 97940756160. Its totient is φ = 29018456064.

The previous prime is 55455120401. The next prime is 55455120407. The reversal of 55455120405 is 50402155455.

55455120405 is a `hidden beast` number, since 5 + 545 + 51 + 20 + 40 + 5 = 666.

It is not a de Polignac number, because 55455120405 - 2² = 55455120401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55455120405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55455120401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1368597 + ... + 1408533.

It is an arithmetic number, because the mean of its divisors is an integer number (2040432420).

Almost surely, 2^55455120405 is an apocalyptic number.

It is an amenable number.

55455120405 is a deficient number, since it is larger than the sum of its proper divisors (42485635755).

55455120405 is a wasteful number, since it uses less digits than its factorization.

55455120405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40530 (or 40527 counting only the distinct ones).

The product of its (nonzero) digits is 100000, while the sum is 36.

The spelling of 55455120405 in words is "fifty-five billion, four hundred fifty-five million, one hundred twenty thousand, four hundred five".