1361216162025 has 108 divisors (see below), whose sum is σ = 2527448927484. Its totient is φ = 700283750400.

The previous prime is 1361216162021. The next prime is 1361216162029. The reversal of 1361216162025 is 5202616121631.

1361216162025 is a `hidden beast` number, since 1 + 3 + 6 + 1 + 2 + 1 + 6 + 1 + 620 + 25 = 666.

It is an interprime number because it is at equal distance from previous prime (1361216162021) and next prime (1361216162029).

It can be written as a sum of positive squares in 6 ways, for example, as 649236285504 + 711979876521 = 805752^2 + 843789^2 .

It is not a de Polignac number, because 1361216162025 - 2² = 1361216162021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361216162021) by changing a digit.

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 107 ways as a sum of consecutive naturals, for example, 67668369 + ... + 67688481.

Almost surely, 2^{1361216162025} is an apocalyptic number.

1361216162025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1361216162025 is a deficient number, since it is larger than the sum of its proper divisors (1166232765459).

1361216162025 is a wasteful number, since it uses less digits than its factorization.

1361216162025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20504 (or 20465 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 1361216162025 in words is "one trillion, three hundred sixty-one billion, two hundred sixteen million, one hundred sixty-two thousand, twenty-five".