438246225985 has 16 divisors (see below), whose sum is σ = 528746446800. Its totient is φ = 348701423616.

The previous prime is 438246225973. The next prime is 438246226009. The reversal of 438246225985 is 589522642834.

It can be written as a sum of positive squares in 8 ways, for example, as 21741207601 + 416505018384 = 147449^2 + 645372^2 .

It is a cyclic number.

It is not a de Polignac number, because 438246225985 - 2⁵ = 438246225953 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371211 + ... + 1007119.

It is an arithmetic number, because the mean of its divisors is an integer number (33046652925).

Almost surely, 2^438246225985 is an apocalyptic number.

It is an amenable number.

438246225985 is a deficient number, since it is larger than the sum of its proper divisors (90500220815).

438246225985 is a wasteful number, since it uses less digits than its factorization.

438246225985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636660.

The product of its digits is 33177600, while the sum is 58.

The spelling of 438246225985 in words is "four hundred thirty-eight billion, two hundred forty-six million, two hundred twenty-five thousand, nine hundred eighty-five".