55154545551 has 24 divisors (see below), whose sum is σ = 92145755520. Its totient is φ = 31137158736.

The previous prime is 55154545529. The next prime is 55154545553. The reversal of 55154545551 is 15554545155.

55154545551 is a `hidden beast` number, since 5 + 5 + 1 + 54 + 5 + 45 + 551 = 666.

It is not a de Polignac number, because 55154545551 - 2⁵ = 55154545519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55154545497 and 55154545506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55154545553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5268681 + ... + 5279138.

It is an arithmetic number, because the mean of its divisors is an integer number (3839406480).

Almost surely, 2^55154545551 is an apocalyptic number.

55154545551 is a deficient number, since it is larger than the sum of its proper divisors (36991209969).

55154545551 is a wasteful number, since it uses less digits than its factorization.

55154545551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10547915 (or 10547912 counting only the distinct ones).

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

The spelling of 55154545551 in words is "fifty-five billion, one hundred fifty-four million, five hundred forty-five thousand, five hundred fifty-one".