55550049991 has 2 divisors, whose sum is σ = 55550049992. Its totient is φ = 55550049990.

The previous prime is 55550049967. The next prime is 55550050001. The reversal of 55550049991 is 19994005555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55550049991 - 2²⁹ = 55013179079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55550049901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27775024995 + 27775024996.

It is an arithmetic number, because the mean of its divisors is an integer number (27775024996).

Almost surely, 2^55550049991 is an apocalyptic number.

55550049991 is a deficient number, since it is larger than the sum of its proper divisors (1).

55550049991 is an equidigital number, since it uses as much as digits as its factorization.

55550049991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1822500, while the sum is 52.

The spelling of 55550049991 in words is "fifty-five billion, five hundred fifty million, forty-nine thousand, nine hundred ninety-one".