2405964487681 has 8 divisors (see below), whose sum is σ = 2423745374400. Its totient is φ = 2388205380912.

The previous prime is 2405964487673. The next prime is 2405964487711. The reversal of 2405964487681 is 1867844695042.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2405964487681 - 2³ = 2405964487673 is a prime.

It is a super-2 number, since 2×2405964487681² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2405964485681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5223205 + ... + 5665138.

It is an arithmetic number, because the mean of its divisors is an integer number (302968171800).

Almost surely, 2^{2405964487681} is an apocalyptic number.

It is an amenable number.

2405964487681 is a deficient number, since it is larger than the sum of its proper divisors (17780886719).

2405964487681 is a wasteful number, since it uses less digits than its factorization.

2405964487681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10889975.

The product of its (nonzero) digits is 92897280, while the sum is 64.

The spelling of 2405964487681 in words is "two trillion, four hundred five billion, nine hundred sixty-four million, four hundred eighty-seven thousand, six hundred eighty-one".