1048020648781 has 4 divisors (see below), whose sum is σ = 1052005518432. Its totient is φ = 1044035779132.

The previous prime is 1048020648751. The next prime is 1048020648791. The reversal of 1048020648781 is 1878460208401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1048020648781 - 2³¹ = 1045873165133 is a prime.

It is a super-2 number, since 2×1048020648781² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1048020648751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1992434431 + ... + 1992434956.

It is an arithmetic number, because the mean of its divisors is an integer number (263001379608).

Almost surely, 2^{1048020648781} is an apocalyptic number.

It is an amenable number.

1048020648781 is a deficient number, since it is larger than the sum of its proper divisors (3984869651).

1048020648781 is an equidigital number, since it uses as much as digits as its factorization.

1048020648781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3984869650.

The product of its (nonzero) digits is 688128, while the sum is 49.

The spelling of 1048020648781 in words is "one trillion, forty-eight billion, twenty million, six hundred forty-eight thousand, seven hundred eighty-one".