4170921985 has 8 divisors (see below), whose sum is σ = 5038698600. Its totient is φ = 3314342784.

The previous prime is 4170921949. The next prime is 4170921991. The reversal of 4170921985 is 5891290714.

It can be written as a sum of positive squares in 4 ways, for example, as 233233984 + 3937688001 = 15272^2 + 62751^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4170921985 - 2¹³ = 4170913793 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2798532 + ... + 2800021.

It is an arithmetic number, because the mean of its divisors is an integer number (629837325).

Almost surely, 2^4170921985 is an apocalyptic number.

It is an amenable number.

4170921985 is a deficient number, since it is larger than the sum of its proper divisors (867776615).

4170921985 is a wasteful number, since it uses less digits than its factorization.

4170921985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5598707.

The product of its (nonzero) digits is 181440, while the sum is 46.

The square root of 4170921985 is about 64582.6755794462. The cubic root of 4170921985 is about 1609.6965832555.

The spelling of 4170921985 in words is "four billion, one hundred seventy million, nine hundred twenty-one thousand, nine hundred eighty-five".