840261353255 has 4 divisors (see below), whose sum is σ = 1008313623912. Its totient is φ = 672209082600.

The previous prime is 840261353221. The next prime is 840261353297. The reversal of 840261353255 is 552353162048.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-840261353255 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 84026135321 + ... + 84026135330.

It is an arithmetic number, because the mean of its divisors is an integer number (252078405978).

Almost surely, 2^840261353255 is an apocalyptic number.

840261353255 is a deficient number, since it is larger than the sum of its proper divisors (168052270657).

840261353255 is a wasteful number, since it uses less digits than its factorization.

840261353255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168052270656.

The product of its (nonzero) digits is 864000, while the sum is 44.

The spelling of 840261353255 in words is "eight hundred forty billion, two hundred sixty-one million, three hundred fifty-three thousand, two hundred fifty-five".