1289949166957 has 12 divisors (see below), whose sum is σ = 1417914499708. Its totient is φ = 1172650881600.

The previous prime is 1289949166951. The next prime is 1289949167021. The reversal of 1289949166957 is 7596619499821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 301424058441 + 988525108516 = 549021^2 + 994246^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1289949166957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289949166951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5556433 + ... + 5783929.

Almost surely, 2^{1289949166957} is an apocalyptic number.

It is an amenable number.

1289949166957 is a deficient number, since it is larger than the sum of its proper divisors (127965332751).

1289949166957 is a wasteful number, since it uses less digits than its factorization.

1289949166957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274380 (or 274369 counting only the distinct ones).

The product of its digits is 529079040, while the sum is 76.

The spelling of 1289949166957 in words is "one trillion, two hundred eighty-nine billion, nine hundred forty-nine million, one hundred sixty-six thousand, nine hundred fifty-seven".