55478440545 has 16 divisors (see below), whose sum is σ = 96835096512. Its totient is φ = 26898637760.

The previous prime is 55478440529. The next prime is 55478440547. The reversal of 55478440545 is 54504487455.

55478440545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55478440545 - 2⁴ = 55478440529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55478440547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168116322 + ... + 168116651.

It is an arithmetic number, because the mean of its divisors is an integer number (6052193532).

Almost surely, 2^55478440545 is an apocalyptic number.

55478440545 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55478440545 is a deficient number, since it is larger than the sum of its proper divisors (41356655967).

55478440545 is a wasteful number, since it uses less digits than its factorization.

55478440545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336232992.

The product of its (nonzero) digits is 8960000, while the sum is 51.

The spelling of 55478440545 in words is "fifty-five billion, four hundred seventy-eight million, four hundred forty thousand, five hundred forty-five".