1289493407552 has 56 divisors (see below), whose sum is σ = 2930201237376. Its totient is φ = 551541247488.

The previous prime is 1289493407537. The next prime is 1289493407611. The reversal of 1289493407552 is 2557043949821.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 1289493407491 and 1289493407500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2635823 + ... + 3086510.

It is an arithmetic number, because the mean of its divisors is an integer number (52325022096).

Almost surely, 2^{1289493407552} is an apocalyptic number.

It is an amenable number.

1289493407552 is an abundant number, since it is smaller than the sum of its proper divisors (1640707829824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1289493407552 is an equidigital number, since it uses as much as digits as its factorization.

1289493407552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5722855 (or 5722845 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 59.

The spelling of 1289493407552 in words is "one trillion, two hundred eighty-nine billion, four hundred ninety-three million, four hundred seven thousand, five hundred fifty-two".