85772655 has 16 divisors (see below), whose sum is σ = 152484960. Its totient is φ = 45745344.

The previous prime is 85772651. The next prime is 85772723. The reversal of 85772655 is 55627758.

85772655 is a `hidden beast` number, since 8 + 577 + 26 + 55 = 666.

It is not a de Polignac number, because 85772655 - 2² = 85772651 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 85772655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85772651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317542 + ... + 317811.

It is an arithmetic number, because the mean of its divisors is an integer number (9530310).

Almost surely, 2^85772655 is an apocalyptic number.

85772655 is a deficient number, since it is larger than the sum of its proper divisors (66712305).

85772655 is a wasteful number, since it uses less digits than its factorization.

85772655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635367 (or 635361 counting only the distinct ones).

The product of its digits is 588000, while the sum is 45.

The square root of 85772655 is about 9261.3527629607. The cubic root of 85772655 is about 441.0111987531.

The spelling of 85772655 in words is "eighty-five million, seven hundred seventy-two thousand, six hundred fifty-five".