3991695485 has 8 divisors (see below), whose sum is σ = 4791122136. Its totient is φ = 3192631360.

The previous prime is 3991695469. The next prime is 3991695497. The reversal of 3991695485 is 5845961993.

It can be written as a sum of positive squares in 4 ways, for example, as 338339236 + 3653356249 = 18394^2 + 60443^2 .

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

It is not a de Polignac number, because 3991695485 - 2⁴ = 3991695469 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 7 ways as a sum of consecutive naturals, for example, 65786 + ... + 110955.

It is an arithmetic number, because the mean of its divisors is an integer number (598890267).

Almost surely, 2^3991695485 is an apocalyptic number.

It is an amenable number.

3991695485 is a deficient number, since it is larger than the sum of its proper divisors (799426651).

3991695485 is a wasteful number, since it uses less digits than its factorization.

3991695485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181263.

The product of its digits is 10497600, while the sum is 59.

The square root of 3991695485 is about 63179.8661362938. The cubic root of 3991695485 is about 1586.3017411927.

The spelling of 3991695485 in words is "three billion, nine hundred ninety-one million, six hundred ninety-five thousand, four hundred eighty-five".