405494935439 has 16 divisors (see below), whose sum is σ = 451691056800. Its totient is φ = 360928028160.

The previous prime is 405494935381. The next prime is 405494935477. The reversal of 405494935439 is 934539494504.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405494935439 is a prime.

It is a super-2 number, since 2×405494935439² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405494935039) 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, 1732964 + ... + 1952985.

It is an arithmetic number, because the mean of its divisors is an integer number (28230691050).

Almost surely, 2^405494935439 is an apocalyptic number.

405494935439 is a deficient number, since it is larger than the sum of its proper divisors (46196121361).

405494935439 is a wasteful number, since it uses less digits than its factorization.

405494935439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3686170.

The product of its (nonzero) digits is 41990400, while the sum is 59.

The spelling of 405494935439 in words is "four hundred five billion, four hundred ninety-four million, nine hundred thirty-five thousand, four hundred thirty-nine".