438640400461 has 8 divisors (see below), whose sum is σ = 438916216320. Its totient is φ = 438364675248.

The previous prime is 438640400459. The next prime is 438640400489. The reversal of 438640400461 is 164004046834.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 438640400461 - 2¹ = 438640400459 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438640407461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11389740 + ... + 11428186.

It is an arithmetic number, because the mean of its divisors is an integer number (54864527040).

Almost surely, 2^438640400461 is an apocalyptic number.

It is an amenable number.

438640400461 is a deficient number, since it is larger than the sum of its proper divisors (275815859).

438640400461 is a wasteful number, since it uses less digits than its factorization.

438640400461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45323.

The product of its (nonzero) digits is 221184, while the sum is 40.

The spelling of 438640400461 in words is "four hundred thirty-eight billion, six hundred forty million, four hundred thousand, four hundred sixty-one".