1280852591989 has 8 divisors (see below), whose sum is σ = 1356240630528. Its totient is φ = 1205469416640.

The previous prime is 1280852591987. The next prime is 1280852592007. The reversal of 1280852591989 is 9891952580821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1280852591989 - 2¹ = 1280852591987 is a prime.

It is a super-2 number, since 2×1280852591989² (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 (1280852591987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666447 + ... + 1733740.

It is an arithmetic number, because the mean of its divisors is an integer number (169530078816).

Almost surely, 2^{1280852591989} is an apocalyptic number.

It is an amenable number.

1280852591989 is a deficient number, since it is larger than the sum of its proper divisors (75388038539).

1280852591989 is a wasteful number, since it uses less digits than its factorization.

1280852591989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431595.

The product of its (nonzero) digits is 37324800, while the sum is 67.

The spelling of 1280852591989 in words is "one trillion, two hundred eighty billion, eight hundred fifty-two million, five hundred ninety-one thousand, nine hundred eighty-nine".