215555434398 has 12 divisors (see below), whose sum is σ = 467036774568. Its totient is φ = 71851811460.

The previous prime is 215555434357. The next prime is 215555434403. The reversal of 215555434398 is 893434555512.

215555434398 is a `hidden beast` number, since 2 + 1 + 5 + 5 + 5 + 543 + 4 + 3 + 98 = 666.

215555434398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5987650938 + ... + 5987650973.

It is an arithmetic number, because the mean of its divisors is an integer number (38919731214).

Almost surely, 2^215555434398 is an apocalyptic number.

215555434398 is an abundant number, since it is smaller than the sum of its proper divisors (251481340170).

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

215555434398 is a wasteful number, since it uses less digits than its factorization.

215555434398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11975301919 (or 11975301916 counting only the distinct ones).

The product of its digits is 12960000, while the sum is 54.

The spelling of 215555434398 in words is "two hundred fifteen billion, five hundred fifty-five million, four hundred thirty-four thousand, three hundred ninety-eight".