406441025538 has 16 divisors (see below), whose sum is σ = 814310673120. Its totient is φ = 135242238176.

The previous prime is 406441025503. The next prime is 406441025561. The reversal of 406441025538 is 835520144604.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 406441025538.

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, 59522220 + ... + 59529047.

It is an arithmetic number, because the mean of its divisors is an integer number (50894417070).

Almost surely, 2^406441025538 is an apocalyptic number.

406441025538 is an abundant number, since it is smaller than the sum of its proper divisors (407869647582).

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

406441025538 is a wasteful number, since it uses less digits than its factorization.

406441025538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119051841.

The product of its (nonzero) digits is 460800, while the sum is 42.

The spelling of 406441025538 in words is "four hundred six billion, four hundred forty-one million, twenty-five thousand, five hundred thirty-eight".