49689288613 has 4 divisors (see below), whose sum is σ = 49723487788. Its totient is φ = 49655089440.

The previous prime is 49689288601. The next prime is 49689288617. The reversal of 49689288613 is 31688298694.

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 23269061764 + 26420226849 = 152542^2 + 162543^2 .

It is a cyclic number.

It is not a de Polignac number, because 49689288613 - 2⁹ = 49689288101 is a prime.

It is a super-2 number, since 2×49689288613² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49689288617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17097408 + ... + 17100313.

It is an arithmetic number, because the mean of its divisors is an integer number (12430871947).

Almost surely, 2^49689288613 is an apocalyptic number.

It is an amenable number.

49689288613 is a deficient number, since it is larger than the sum of its proper divisors (34199175).

49689288613 is a wasteful number, since it uses less digits than its factorization.

49689288613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34199174.

The product of its digits is 35831808, while the sum is 64.

The spelling of 49689288613 in words is "forty-nine billion, six hundred eighty-nine million, two hundred eighty-eight thousand, six hundred thirteen".