855241686440 has 32 divisors (see below), whose sum is σ = 1928468009160. Its totient is φ = 341354592000.

The previous prime is 855241686437. The next prime is 855241686443. The reversal of 855241686440 is 44686142558.

It is an interprime number because it is at equal distance from previous prime (855241686437) and next prime (855241686443).

It can be written as a sum of positive squares in 4 ways, for example, as 633300823204 + 221940863236 = 795802^2 + 471106^2 .

It is not an unprimeable number, because it can be changed into a prime (855241686443) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 23171411 + ... + 23208290.

Almost surely, 2^855241686440 is an apocalyptic number.

It is an amenable number.

855241686440 is an abundant number, since it is smaller than the sum of its proper divisors (1073226322720).

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

855241686440 is a wasteful number, since it uses less digits than its factorization.

855241686440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46380173 (or 46380169 counting only the distinct ones).

The product of its (nonzero) digits is 7372800, while the sum is 53.

The spelling of 855241686440 in words is "eight hundred fifty-five billion, two hundred forty-one million, six hundred eighty-six thousand, four hundred forty".