49815506538 has 96 divisors (see below), whose sum is σ = 130662979200. Its totient is φ = 13390202880.

The previous prime is 49815506483. The next prime is 49815506539. The reversal of 49815506538 is 83560551894.

49815506538 is a `hidden beast` number, since 4 + 9 + 81 + 5 + 506 + 53 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (49815506539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9767113 + ... + 9772211.

It is an arithmetic number, because the mean of its divisors is an integer number (1361072700).

Almost surely, 2^49815506538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49815506538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65331489600).

49815506538 is an abundant number, since it is smaller than the sum of its proper divisors (80847472662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

49815506538 is a wasteful number, since it uses less digits than its factorization.

49815506538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9692 (or 9689 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 54.

The spelling of 49815506538 in words is "forty-nine billion, eight hundred fifteen million, five hundred six thousand, five hundred thirty-eight".