1381698985161 has 32 divisors (see below), whose sum is σ = 2118000890880. Its totient is φ = 792389649600.

The previous prime is 1381698985141. The next prime is 1381698985201. The reversal of 1381698985161 is 1615898961831.

It is a happy number.

It is not a de Polignac number, because 1381698985161 - 2⁵ = 1381698985129 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1381698985092 and 1381698985101.

It is not an unprimeable number, because it can be changed into a prime (1381698985141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 756885 + ... + 1826546.

It is an arithmetic number, because the mean of its divisors is an integer number (66187527840).

Almost surely, 2^{1381698985161} is an apocalyptic number.

1381698985161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1381698985161 is a deficient number, since it is larger than the sum of its proper divisors (736301905719).

1381698985161 is a wasteful number, since it uses less digits than its factorization.

1381698985161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2584317.

The product of its digits is 22394880, while the sum is 66.

The spelling of 1381698985161 in words is "one trillion, three hundred eighty-one billion, six hundred ninety-eight million, nine hundred eighty-five thousand, one hundred sixty-one".