405412420520 has 16 divisors (see below), whose sum is σ = 912177946260. Its totient is φ = 162164968192.

The previous prime is 405412420519. The next prime is 405412420529. The reversal of 405412420520 is 25024214504.

It can be written as a sum of positive squares in 2 ways, for example, as 396504458596 + 8907961924 = 629686^2 + 94382^2 .

It is not an unprimeable number, because it can be changed into a prime (405412420529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5067655217 + ... + 5067655296.

Almost surely, 2^405412420520 is an apocalyptic number.

405412420520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

405412420520 is an abundant number, since it is smaller than the sum of its proper divisors (506765525740).

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

405412420520 is a wasteful number, since it uses less digits than its factorization.

405412420520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10135310524 (or 10135310520 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

The spelling of 405412420520 in words is "four hundred five billion, four hundred twelve million, four hundred twenty thousand, five hundred twenty".