49917720361 has 2 divisors, whose sum is σ = 49917720362. Its totient is φ = 49917720360.

The previous prime is 49917720343. The next prime is 49917720383. The reversal of 49917720361 is 16302771994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28402697961 + 21515022400 = 168531^2 + 146680^2 .

It is a cyclic number.

It is not a de Polignac number, because 49917720361 - 2¹¹ = 49917718313 is a prime.

It is not a weakly prime, because it can be changed into another prime (49917720301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24958860180 + 24958860181.

It is an arithmetic number, because the mean of its divisors is an integer number (24958860181).

Almost surely, 2^49917720361 is an apocalyptic number.

It is an amenable number.

49917720361 is a deficient number, since it is larger than the sum of its proper divisors (1).

49917720361 is an equidigital number, since it uses as much as digits as its factorization.

49917720361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 571536, while the sum is 49.

The spelling of 49917720361 in words is "forty-nine billion, nine hundred seventeen million, seven hundred twenty thousand, three hundred sixty-one".