855576638 has 8 divisors (see below), whose sum is σ = 1466702832. Its totient is φ = 366675696.

The previous prime is 855576619. The next prime is 855576653. The reversal of 855576638 is 836675558.

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

It is a super-2 number, since 2×855576638² = 1464022766982766088, which contains 22 as substring.

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 855576638.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30556295 + ... + 30556322.

It is an arithmetic number, because the mean of its divisors is an integer number (183337854).

Almost surely, 2^855576638 is an apocalyptic number.

855576638 is a deficient number, since it is larger than the sum of its proper divisors (611126194).

855576638 is a wasteful number, since it uses less digits than its factorization.

855576638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61112626.

The product of its digits is 6048000, while the sum is 53.

The square root of 855576638 is about 29250.2416742153. The cubic root of 855576638 is about 949.3353200980.

The spelling of 855576638 in words is "eight hundred fifty-five million, five hundred seventy-six thousand, six hundred thirty-eight".