49268665538 has 4 divisors (see below), whose sum is σ = 73902998310. Its totient is φ = 24634332768.

The previous prime is 49268665531. The next prime is 49268665561. The reversal of 49268665538 is 83556686294.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83556686294 = 2 ⋅41778343147.

It can be written as a sum of positive squares in only one way, i.e., 43377642529 + 5891023009 = 208273^2 + 76753^2 .

It is not an unprimeable number, because it can be changed into a prime (49268665531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12317166383 + ... + 12317166386.

Almost surely, 2^49268665538 is an apocalyptic number.

49268665538 is a deficient number, since it is larger than the sum of its proper divisors (24634332772).

49268665538 is a wasteful number, since it uses less digits than its factorization.

49268665538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24634332771.

The product of its digits is 74649600, while the sum is 62.

The spelling of 49268665538 in words is "forty-nine billion, two hundred sixty-eight million, six hundred sixty-five thousand, five hundred thirty-eight".