49217380561 has 12 divisors (see below), whose sum is σ = 52504325388. Its totient is φ = 45974118912.

The previous prime is 49217380549. The next prime is 49217380577. The reversal of 49217380561 is 16508371294.

49217380561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 4921864336 + 44295516225 = 70156^2 + 210465^2 .

It is not a de Polignac number, because 49217380561 - 2⁵ = 49217380529 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49217381561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10704115 + ... + 10708711.

It is an arithmetic number, because the mean of its divisors is an integer number (4375360449).

It is a 1-persistent number, because it is pandigital, but 2⋅49217380561 = 98434761122 is not.

Almost surely, 2^49217380561 is an apocalyptic number.

It is an amenable number.

49217380561 is a deficient number, since it is larger than the sum of its proper divisors (3286944827).

49217380561 is an frugal number, since it uses more digits than its factorization.

49217380561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9348 (or 4751 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 49217380561 in words is "forty-nine billion, two hundred seventeen million, three hundred eighty thousand, five hundred sixty-one".