55449447069 has 16 divisors (see below), whose sum is σ = 79099590080. Its totient is φ = 34446591360.

The previous prime is 55449447059. The next prime is 55449447101. The reversal of 55449447069 is 96074494455.

It is not a de Polignac number, because 55449447069 - 2⁵ = 55449447037 is a prime.

It is a super-2 number, since 2×55449447069² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55449447019) 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 15 ways as a sum of consecutive naturals, for example, 7970272 + ... + 7977225.

It is an arithmetic number, because the mean of its divisors is an integer number (4943724380).

Almost surely, 2^55449447069 is an apocalyptic number.

It is an amenable number.

55449447069 is a deficient number, since it is larger than the sum of its proper divisors (23650143011).

55449447069 is a wasteful number, since it uses less digits than its factorization.

55449447069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15947580.

The product of its (nonzero) digits is 21772800, while the sum is 57.

The spelling of 55449447069 in words is "fifty-five billion, four hundred forty-nine million, four hundred forty-seven thousand, sixty-nine".