855036081 has 45 divisors (see below), whose sum is σ = 1353737801. Its totient is φ = 540022788.

The previous prime is 855036059. The next prime is 855036113. The reversal of 855036081 is 180630558.

The square root of 855036081 is 29241.

It is a perfect power (a square, a biquadrate), and thus also a powerful number.

It is not a de Polignac number, because 855036081 - 2⁷ = 855035953 is a prime.

It is a super-2 number, since 2×855036081² = 1462173399623677122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855036011) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 45001890 + ... + 45001908.

Almost surely, 2^855036081 is an apocalyptic number.

855036081 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

855036081 is the 29241-st square number.

855036081 is the 14621-st centered octagonal number.

It is an amenable number.

855036081 is a deficient number, since it is larger than the sum of its proper divisors (498701720).

855036081 is an frugal number, since it uses more digits than its factorization.

855036081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 22 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The cubic root of 855036081 is about 949.1353465979.

Multiplying 855036081 by its sum of digits (36), we get a square (30781298916 = 175446²).

The spelling of 855036081 in words is "eight hundred fifty-five million, thirty-six thousand, eighty-one".