1289949166952 has 8 divisors (see below), whose sum is σ = 2418654688050. Its totient is φ = 644974583472.

The previous prime is 1289949166951. The next prime is 1289949167021. The reversal of 1289949166952 is 2596619499821.

It can be written as a sum of positive squares in only one way, i.e., 1257345086596 + 32604080356 = 1121314^2 + 180566^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 80621822927 + ... + 80621822942.

Almost surely, 2^{1289949166952} is an apocalyptic number.

It is an amenable number.

1289949166952 is a deficient number, since it is larger than the sum of its proper divisors (1128705521098).

1289949166952 is a wasteful number, since it uses less digits than its factorization.

1289949166952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161243645875 (or 161243645871 counting only the distinct ones).

The product of its digits is 151165440, while the sum is 71.

The spelling of 1289949166952 in words is "one trillion, two hundred eighty-nine billion, nine hundred forty-nine million, one hundred sixty-six thousand, nine hundred fifty-two".