48538820991 has 16 divisors (see below), whose sum is σ = 68132633600. Its totient is φ = 30652509888.

The previous prime is 48538820977. The next prime is 48538821011. The reversal of 48538820991 is 19902883584.

It is a happy number.

It is not a de Polignac number, because 48538820991 - 2⁵ = 48538820959 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (48538820191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 492915 + ... + 583131.

It is an arithmetic number, because the mean of its divisors is an integer number (4258289600).

Almost surely, 2^48538820991 is an apocalyptic number.

48538820991 is a deficient number, since it is larger than the sum of its proper divisors (19593812609).

48538820991 is a wasteful number, since it uses less digits than its factorization.

48538820991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99678.

The product of its (nonzero) digits is 4976640, while the sum is 57.

The spelling of 48538820991 in words is "forty-eight billion, five hundred thirty-eight million, eight hundred twenty thousand, nine hundred ninety-one".