49396739561 has 4 divisors (see below), whose sum is σ = 53196488772. Its totient is φ = 45596990352.

The previous prime is 49396739527. The next prime is 49396739593. The reversal of 49396739561 is 16593769394.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3111519961 + 46285219600 = 55781^2 + 215140^2 .

It is a cyclic number.

It is not a de Polignac number, because 49396739561 - 2¹⁰ = 49396738537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 49396739494 and 49396739503.

It is not an unprimeable number, because it can be changed into a prime (49396738561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1899874586 + ... + 1899874611.

It is an arithmetic number, because the mean of its divisors is an integer number (13299122193).

Almost surely, 2^49396739561 is an apocalyptic number.

It is an amenable number.

49396739561 is a deficient number, since it is larger than the sum of its proper divisors (3799749211).

49396739561 is a wasteful number, since it uses less digits than its factorization.

49396739561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3799749210.

The product of its digits is 33067440, while the sum is 62.

The spelling of 49396739561 in words is "forty-nine billion, three hundred ninety-six million, seven hundred thirty-nine thousand, five hundred sixty-one".