3649853871 has 8 divisors (see below), whose sum is σ = 5407190960. Its totient is φ = 2433235896.

The previous prime is 3649853821. The next prime is 3649853891. The reversal of 3649853871 is 1783589463.

3649853871 is a `hidden beast` number, since 36 + 4 + 9 + 8 + 538 + 71 = 666.

It is not a de Polignac number, because 3649853871 - 2¹⁰ = 3649852847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649853821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67589860 + ... + 67589913.

It is an arithmetic number, because the mean of its divisors is an integer number (675898870).

Almost surely, 2^3649853871 is an apocalyptic number.

3649853871 is a deficient number, since it is larger than the sum of its proper divisors (1757337089).

3649853871 is a wasteful number, since it uses less digits than its factorization.

3649853871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135179782 (or 135179776 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 3649853871 is about 60414.0204836593. The cubic root of 3649853871 is about 1539.6611767945.

The spelling of 3649853871 in words is "three billion, six hundred forty-nine million, eight hundred fifty-three thousand, eight hundred seventy-one".