438686508546450 has 36 divisors (see below), whose sum is σ = 1178604419629338. Its totient is φ = 116983068945600.

The previous prime is 438686508546439. The next prime is 438686508546553. The reversal of 438686508546450 is 54645805686834.

438686508546450 is a `hidden beast` number, since 4 + 3 + 8 + 6 + 8 + 6 + 50 + 85 + 46 + 450 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 402722175707721 + 35964332838729 = 20067939^2 + 5997027^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 487429453491 + ... + 487429454390.

Almost surely, 2^{438686508546450} is an apocalyptic number.

438686508546450 is an abundant number, since it is smaller than the sum of its proper divisors (739917911082888).

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

438686508546450 is a wasteful number, since it uses less digits than its factorization.

438686508546450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974858907899 (or 974858907891 counting only the distinct ones).

The product of its (nonzero) digits is 2654208000, while the sum is 72.

The spelling of 438686508546450 in words is "four hundred thirty-eight trillion, six hundred eighty-six billion, five hundred eight million, five hundred forty-six thousand, four hundred fifty".