55474990069 has 2 divisors, whose sum is σ = 55474990070. Its totient is φ = 55474990068.

The previous prime is 55474990063. The next prime is 55474990073. The reversal of 55474990069 is 96009947455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52803444100 + 2671545969 = 229790^2 + 51687^2 .

It is a cyclic number.

It is not a de Polignac number, because 55474990069 - 2²⁷ = 55340772341 is a prime.

It is a super-2 number, since 2×55474990069² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55474989995 and 55474990022.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55474990063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27737495034 + 27737495035.

It is an arithmetic number, because the mean of its divisors is an integer number (27737495035).

Almost surely, 2^55474990069 is an apocalyptic number.

It is an amenable number.

55474990069 is a deficient number, since it is larger than the sum of its proper divisors (1).

55474990069 is an equidigital number, since it uses as much as digits as its factorization.

55474990069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12247200, while the sum is 58.

The spelling of 55474990069 in words is "fifty-five billion, four hundred seventy-four million, nine hundred ninety thousand, sixty-nine".