1298873672650 has 12 divisors (see below), whose sum is σ = 2415905031222. Its totient is φ = 519549469040.

The previous prime is 1298873672639. The next prime is 1298873672687. The reversal of 1298873672650 is 562763788921.

It can be written as a sum of positive squares in 3 ways, for example, as 1038868524001 + 260005148649 = 1019249^2 + 509907^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12988736677 + ... + 12988736776.

Almost surely, 2^{1298873672650} is an apocalyptic number.

1298873672650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1298873672650 is a deficient number, since it is larger than the sum of its proper divisors (1117031358572).

1298873672650 is a wasteful number, since it uses less digits than its factorization.

1298873672650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25977473465 (or 25977473460 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 64.

The spelling of 1298873672650 in words is "one trillion, two hundred ninety-eight billion, eight hundred seventy-three million, six hundred seventy-two thousand, six hundred fifty".