2144600897661 has 12 divisors (see below), whose sum is σ = 3097779607260. Its totient is φ = 1429723429440.

The previous prime is 2144600897633. The next prime is 2144600897671. The reversal of 2144600897661 is 1667980064412.

2144600897661 is a `hidden beast` number, since 21 + 4 + 4 + 600 + 8 + 9 + 7 + 6 + 6 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1673579481561 + 471021416100 = 1293669^2 + 686310^2 .

It is not a de Polignac number, because 2144600897661 - 2⁷ = 2144600897533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2144600897598 and 2144600897607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144600897671) 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 11 ways as a sum of consecutive naturals, for example, 538225 + ... + 2139833.

It is an arithmetic number, because the mean of its divisors is an integer number (258148300605).

Almost surely, 2^{2144600897661} is an apocalyptic number.

It is an amenable number.

2144600897661 is a deficient number, since it is larger than the sum of its proper divisors (953178709599).

2144600897661 is a wasteful number, since it uses less digits than its factorization.

2144600897661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750396 (or 1750393 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 2144600897661 in words is "two trillion, one hundred forty-four billion, six hundred million, eight hundred ninety-seven thousand, six hundred sixty-one".