49536681538 has 4 divisors (see below), whose sum is σ = 74305022310. Its totient is φ = 24768340768.

The previous prime is 49536681533. The next prime is 49536681559. The reversal of 49536681538 is 83518663594.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83518663594 = 2 ⋅41759331797.

It can be written as a sum of positive squares in only one way, i.e., 49522716369 + 13965169 = 222537^2 + 3737^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (49536681533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12384170383 + ... + 12384170386.

Almost surely, 2^49536681538 is an apocalyptic number.

49536681538 is a deficient number, since it is larger than the sum of its proper divisors (24768340772).

49536681538 is a wasteful number, since it uses less digits than its factorization.

49536681538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24768340771.

The product of its digits is 18662400, while the sum is 58.

The spelling of 49536681538 in words is "forty-nine billion, five hundred thirty-six million, six hundred eighty-one thousand, five hundred thirty-eight".