438321139861 has 16 divisors (see below), whose sum is σ = 484730300160. Its totient is φ = 393016216320.

The previous prime is 438321139847. The next prime is 438321139889. The reversal of 438321139861 is 168931123834.

It is a cyclic number.

It is not a de Polignac number, because 438321139861 - 2⁵ = 438321139829 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 (438321139801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 563521 + ... + 1092793.

It is an arithmetic number, because the mean of its divisors is an integer number (30295643760).

Almost surely, 2^438321139861 is an apocalyptic number.

It is an amenable number.

438321139861 is a deficient number, since it is larger than the sum of its proper divisors (46409160299).

438321139861 is a wasteful number, since it uses less digits than its factorization.

438321139861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530316.

The product of its digits is 746496, while the sum is 49.

The spelling of 438321139861 in words is "four hundred thirty-eight billion, three hundred twenty-one million, one hundred thirty-nine thousand, eight hundred sixty-one".