438129208656 has 100 divisors (see below), whose sum is σ = 1277753483424. Its totient is φ = 144928180800.

The previous prime is 438129208591. The next prime is 438129208709. The reversal of 438129208656 is 656802921834.

438129208656 is a `hidden beast` number, since 4 + 381 + 2 + 9 + 208 + 6 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1120540 + ... + 1460091.

Almost surely, 2^438129208656 is an apocalyptic number.

It is an amenable number.

438129208656 is an abundant number, since it is smaller than the sum of its proper divisors (839624274768).

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

438129208656 is a wasteful number, since it uses less digits than its factorization.

438129208656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2580782 (or 2580767 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 438129208656 in words is "four hundred thirty-eight billion, one hundred twenty-nine million, two hundred eight thousand, six hundred fifty-six".