1289128762625 has 16 divisors (see below), whose sum is σ = 1755090215424. Its totient is φ = 937548190000.

The previous prime is 1289128762619. The next prime is 1289128762643. The reversal of 1289128762625 is 5262678219821.

It is not a de Polignac number, because 1289128762625 - 2¹⁶ = 1289128697089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 468772721 + ... + 468775470.

It is an arithmetic number, because the mean of its divisors is an integer number (109693138464).

Almost surely, 2^{1289128762625} is an apocalyptic number.

It is an amenable number.

1289128762625 is a deficient number, since it is larger than the sum of its proper divisors (465961452799).

1289128762625 is an equidigital number, since it uses as much as digits as its factorization.

1289128762625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937548217 (or 937548207 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 59.

The spelling of 1289128762625 in words is "one trillion, two hundred eighty-nine billion, one hundred twenty-eight million, seven hundred sixty-two thousand, six hundred twenty-five".