1288730892481 has 4 divisors (see below), whose sum is σ = 1316150698752. Its totient is φ = 1261311086212.

The previous prime is 1288730892451. The next prime is 1288730892499. The reversal of 1288730892481 is 1842980378821.

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 1288730892481 - 2⁷ = 1288730892353 is a prime.

It is a super-4 number, since 4×1288730892481⁴ (a number of 50 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1288730892451) 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, 13709903065 + ... + 13709903158.

It is an arithmetic number, because the mean of its divisors is an integer number (329037674688).

Almost surely, 2^{1288730892481} is an apocalyptic number.

It is an amenable number.

1288730892481 is a deficient number, since it is larger than the sum of its proper divisors (27419806271).

1288730892481 is an equidigital number, since it uses as much as digits as its factorization.

1288730892481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27419806270.

The product of its (nonzero) digits is 12386304, while the sum is 61.

The spelling of 1288730892481 in words is "one trillion, two hundred eighty-eight billion, seven hundred thirty million, eight hundred ninety-two thousand, four hundred eighty-one".