85870655 has 16 divisors (see below), whose sum is σ = 117500544. Its totient is φ = 59681280.

The previous prime is 85870643. The next prime is 85870667. The reversal of 85870655 is 55607858.

It is an interprime number because it is at equal distance from previous prime (85870643) and next prime (85870667).

It is not a de Polignac number, because 85870655 - 2⁶ = 85870591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37751 + ... + 39960.

It is an arithmetic number, because the mean of its divisors is an integer number (7343784).

Almost surely, 2^85870655 is an apocalyptic number.

85870655 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

85870655 is a deficient number, since it is larger than the sum of its proper divisors (31629889).

85870655 is a wasteful number, since it uses less digits than its factorization.

85870655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77746.

The product of its (nonzero) digits is 336000, while the sum is 44.

The square root of 85870655 is about 9266.6420563222. The cubic root of 85870655 is about 441.1790947173.

The spelling of 85870655 in words is "eighty-five million, eight hundred seventy thousand, six hundred fifty-five".