55100509949 has 2 divisors, whose sum is σ = 55100509950. Its totient is φ = 55100509948.

The previous prime is 55100509931. The next prime is 55100510053. The reversal of 55100509949 is 94990500155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35400422500 + 19700087449 = 188150^2 + 140357^2 .

It is a cyclic number.

It is not a de Polignac number, because 55100509949 - 2³² = 50805542653 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55100509909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27550254974 + 27550254975.

It is an arithmetic number, because the mean of its divisors is an integer number (27550254975).

Almost surely, 2^55100509949 is an apocalyptic number.

It is an amenable number.

55100509949 is a deficient number, since it is larger than the sum of its proper divisors (1).

55100509949 is an equidigital number, since it uses as much as digits as its factorization.

55100509949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 364500, while the sum is 47.

The spelling of 55100509949 in words is "fifty-five billion, one hundred million, five hundred nine thousand, nine hundred forty-nine".