855572977 has 12 divisors (see below), whose sum is σ = 995871396. Its totient is φ = 732896640.

The previous prime is 855572969. The next prime is 855572987. The reversal of 855572977 is 779275558.

It can be written as a sum of positive squares in 2 ways, for example, as 319372641 + 536200336 = 17871^2 + 23156^2 .

It is not a de Polignac number, because 855572977 - 2³ = 855572969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855572987) 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 11 ways as a sum of consecutive naturals, for example, 93277 + ... + 102037.

It is an arithmetic number, because the mean of its divisors is an integer number (82989283).

Almost surely, 2^855572977 is an apocalyptic number.

It is an amenable number.

855572977 is a deficient number, since it is larger than the sum of its proper divisors (140298419).

855572977 is a wasteful number, since it uses less digits than its factorization.

855572977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10768 (or 10761 counting only the distinct ones).

The product of its digits is 6174000, while the sum is 55.

The square root of 855572977 is about 29250.1790934688. The cubic root of 855572977 is about 949.3339660321. Note that the first 3 decimals are identical.

The spelling of 855572977 in words is "eight hundred fifty-five million, five hundred seventy-two thousand, nine hundred seventy-seven".