48399552781 has 2 divisors, whose sum is σ = 48399552782. Its totient is φ = 48399552780.

The previous prime is 48399552779. The next prime is 48399552827. The reversal of 48399552781 is 18725599384.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45856367881 + 2543184900 = 214141^2 + 50430^2 .

It is a cyclic number.

It is not a de Polignac number, because 48399552781 - 2¹ = 48399552779 is a prime.

It is a super-2 number, since 2×48399552781² (a number of 22 digits) contains 22 as substring.

Together with 48399552779, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (48399552181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24199776390 + 24199776391.

It is an arithmetic number, because the mean of its divisors is an integer number (24199776391).

Almost surely, 2^48399552781 is an apocalyptic number.

It is an amenable number.

48399552781 is a deficient number, since it is larger than the sum of its proper divisors (1).

48399552781 is an equidigital number, since it uses as much as digits as its factorization.

48399552781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21772800, while the sum is 61.

The spelling of 48399552781 in words is "forty-eight billion, three hundred ninety-nine million, five hundred fifty-two thousand, seven hundred eighty-one".