12405820454646 has 16 divisors (see below), whose sum is σ = 24866900694000. Its totient is φ = 4126063520768.

The previous prime is 12405820454639. The next prime is 12405820454653. The reversal of 12405820454646 is 64645402850421.

It is an interprime number because it is at equal distance from previous prime (12405820454639) and next prime (12405820454653).

It is a super-2 number, since 2×12405820454646² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2302488111 + ... + 2302493498.

It is an arithmetic number, because the mean of its divisors is an integer number (1554181293375).

Almost surely, 2^{12405820454646} is an apocalyptic number.

12405820454646 is an abundant number, since it is smaller than the sum of its proper divisors (12461080239354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12405820454646 is a wasteful number, since it uses less digits than its factorization.

12405820454646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4604982063.

The product of its (nonzero) digits is 7372800, while the sum is 51.

The spelling of 12405820454646 in words is "twelve trillion, four hundred five billion, eight hundred twenty million, four hundred fifty-four thousand, six hundred forty-six".