405135013212 has 18 divisors (see below), whose sum is σ = 1024091283488. Its totient is φ = 135045004392.

The previous prime is 405135013181. The next prime is 405135013219. The reversal of 405135013212 is 212310531504.

405135013212 is a `hidden beast` number, since 4 + 0 + 513 + 5 + 0 + 132 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405135013219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5626875148 + ... + 5626875219.

Almost surely, 2^405135013212 is an apocalyptic number.

It is an amenable number.

405135013212 is an abundant number, since it is smaller than the sum of its proper divisors (618956270276).

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

405135013212 is a wasteful number, since it uses less digits than its factorization.

405135013212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11253750377 (or 11253750372 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 405135013212 its reverse (212310531504), we get a palindrome (617445544716).

The spelling of 405135013212 in words is "four hundred five billion, one hundred thirty-five million, thirteen thousand, two hundred twelve".