1048999978849 has 3 divisors (see below), whose sum is σ = 1049001003057. Its totient is φ = 1048998954642.

The previous prime is 1048999978801. The next prime is 1048999978861. The reversal of 1048999978849 is 9488799998401.

The square root of 1048999978849 is 1024207.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1048999978849 - 2¹³ = 1048999970657 is a prime.

It is a super-2 number, since 2×1048999978849² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1048999972849) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 512104 + ... + 1536310.

It is an arithmetic number, because the mean of its divisors is an integer number (349667001019).

Almost surely, 2^{1048999978849} is an apocalyptic number.

1048999978849 is the 1024207-th square number.

1048999978849 is the 512104-th centered octagonal number.

It is an amenable number.

1048999978849 is a deficient number, since it is larger than the sum of its proper divisors (1024208).

1048999978849 is an frugal number, since it uses more digits than its factorization.

1048999978849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2048414 (or 1024207 counting only the distinct ones).

The product of its (nonzero) digits is 3386105856, while the sum is 85.

The spelling of 1048999978849 in words is "one trillion, forty-eight billion, nine hundred ninety-nine million, nine hundred seventy-eight thousand, eight hundred forty-nine".