556731881378 has 8 divisors (see below), whose sum is σ = 863894298780. Its totient is φ = 268767115120.

The previous prime is 556731881339. The next prime is 556731881389. The reversal of 556731881378 is 873188137655.

It can be written as a sum of positive squares in 2 ways, for example, as 548715007009 + 8016874369 = 740753^2 + 89537^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 556731881378.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4799412713 + ... + 4799412828.

Almost surely, 2^556731881378 is an apocalyptic number.

556731881378 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

556731881378 is a deficient number, since it is larger than the sum of its proper divisors (307162417402).

556731881378 is a wasteful number, since it uses less digits than its factorization.

556731881378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9598825572.

The product of its digits is 33868800, while the sum is 62.

The spelling of 556731881378 in words is "five hundred fifty-six billion, seven hundred thirty-one million, eight hundred eighty-one thousand, three hundred seventy-eight".