855059761 has 4 divisors (see below), whose sum is σ = 905357412. Its totient is φ = 804762112.

The previous prime is 855059743. The next prime is 855059771. The reversal of 855059761 is 167950558.

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

It can be written as a sum of positive squares in 2 ways, for example, as 646430625 + 208629136 = 25425^2 + 14444^2 .

It is a cyclic number.

It is not a de Polignac number, because 855059761 - 2⁵ = 855059729 is a prime.

It is a super-3 number, since 3×855059761³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855059771) 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 3 ways as a sum of consecutive naturals, for example, 25148800 + ... + 25148833.

It is an arithmetic number, because the mean of its divisors is an integer number (226339353).

Almost surely, 2^855059761 is an apocalyptic number.

It is an amenable number.

855059761 is a deficient number, since it is larger than the sum of its proper divisors (50297651).

855059761 is a wasteful number, since it uses less digits than its factorization.

855059761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50297650.

The product of its (nonzero) digits is 378000, while the sum is 46.

The square root of 855059761 is about 29241.4049081093. The cubic root of 855059761 is about 949.1441085351.

It can be divided in two parts, 85505 and 9761, that added together give a triangular number (95266 = T₄₃₆).

The spelling of 855059761 in words is "eight hundred fifty-five million, fifty-nine thousand, seven hundred sixty-one".