43406505406 has 16 divisors (see below), whose sum is σ = 71078238720. Its totient is φ = 19716504280.

The previous prime is 43406505391. The next prime is 43406505413. The reversal of 43406505406 is 60450560434.

It is a super-2 number, since 2×43406505406² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 653896 + ... + 717211.

It is an arithmetic number, because the mean of its divisors is an integer number (4442389920).

Almost surely, 2^43406505406 is an apocalyptic number.

43406505406 is a deficient number, since it is larger than the sum of its proper divisors (27671733314).

43406505406 is a wasteful number, since it uses less digits than its factorization.

43406505406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372559.

The product of its (nonzero) digits is 172800, while the sum is 37.

The spelling of 43406505406 in words is "forty-three billion, four hundred six million, five hundred five thousand, four hundred six".