2891208655 has 8 divisors (see below), whose sum is σ = 3481711632. Its totient is φ = 2304792768.

The previous prime is 2891208641. The next prime is 2891208689. The reversal of 2891208655 is 5568021982.

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

It is a cyclic number.

It is not a de Polignac number, because 2891208655 - 2¹¹ = 2891206607 is a prime.

It is a super-4 number, since 4×2891208655⁴ (a number of 39 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1020214 + ... + 1023043.

It is an arithmetic number, because the mean of its divisors is an integer number (435213954).

Almost surely, 2^2891208655 is an apocalyptic number.

2891208655 is a deficient number, since it is larger than the sum of its proper divisors (590502977).

2891208655 is a wasteful number, since it uses less digits than its factorization.

2891208655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043545.

The product of its (nonzero) digits is 345600, while the sum is 46.

The square root of 2891208655 is about 53769.9605263013. The cubic root of 2891208655 is about 1424.6006727588.

The spelling of 2891208655 in words is "two billion, eight hundred ninety-one million, two hundred eight thousand, six hundred fifty-five".