5409646820781 has 16 divisors (see below), whose sum is σ = 8249656570368. Its totient is φ = 3088832295600.

The previous prime is 5409646820779. The next prime is 5409646820783. The reversal of 5409646820781 is 1870286469045.

It is a happy number.

5409646820781 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (5409646820779) and next prime (5409646820783).

It is not a de Polignac number, because 5409646820781 - 2¹ = 5409646820779 is a prime.

It is a super-2 number, since 2×5409646820781² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5409646820783) 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 15 ways as a sum of consecutive naturals, for example, 99741375 + ... + 99795596.

It is an arithmetic number, because the mean of its divisors is an integer number (515603535648).

Almost surely, 2^{5409646820781} is an apocalyptic number.

It is an amenable number.

5409646820781 is a deficient number, since it is larger than the sum of its proper divisors (2840009749587).

5409646820781 is a wasteful number, since it uses less digits than its factorization.

5409646820781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199538272.

The product of its (nonzero) digits is 23224320, while the sum is 60.

The spelling of 5409646820781 in words is "five trillion, four hundred nine billion, six hundred forty-six million, eight hundred twenty thousand, seven hundred eighty-one".