55772045009 has 2 divisors, whose sum is σ = 55772045010. Its totient is φ = 55772045008.

The previous prime is 55772044973. The next prime is 55772045051. The reversal of 55772045009 is 90054027755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42702982609 + 13069062400 = 206647^2 + 114320^2 .

It is a cyclic number.

It is not a de Polignac number, because 55772045009 - 2³² = 51477077713 is a prime.

It is a super-2 number, since 2×55772045009² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (55772045209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27886022504 + 27886022505.

It is an arithmetic number, because the mean of its divisors is an integer number (27886022505).

Almost surely, 2^55772045009 is an apocalyptic number.

It is an amenable number.

55772045009 is a deficient number, since it is larger than the sum of its proper divisors (1).

55772045009 is an equidigital number, since it uses as much as digits as its factorization.

55772045009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 441000, while the sum is 44.

The spelling of 55772045009 in words is "fifty-five billion, seven hundred seventy-two million, forty-five thousand, nine".