48419581981 has 4 divisors (see below), whose sum is σ = 48430064764. Its totient is φ = 48409099200.

The previous prime is 48419581949. The next prime is 48419582059. The reversal of 48419581981 is 18918591484.

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 30105373081 + 18314208900 = 173509^2 + 135330^2 .

It is a 6-Lehmer number, since φ(48419581981) divides (48419581981-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 48419581981 - 2⁵ = 48419581949 is a prime.

It is a super-2 number, since 2×48419581981² (a number of 22 digits) contains 22 as substring.

It is the 220045-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (48419581181) by changing a digit.

It is a nontrivial repunit in base 220044.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5234460 + ... + 5243701.

It is an arithmetic number, because the mean of its divisors is an integer number (12107516191).

Almost surely, 2^48419581981 is an apocalyptic number.

It is an amenable number.

48419581981 is a deficient number, since it is larger than the sum of its proper divisors (10482783).

48419581981 is a wasteful number, since it uses less digits than its factorization.

48419581981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10482782.

The product of its digits is 3317760, while the sum is 58.

The spelling of 48419581981 in words is "forty-eight billion, four hundred nineteen million, five hundred eighty-one thousand, nine hundred eighty-one".