3671211636 has 18 divisors (see below), whose sum is σ = 9280007282. Its totient is φ = 1223737200.

The previous prime is 3671211613. The next prime is 3671211637. The reversal of 3671211636 is 6361121763.

3671211636 is a `hidden beast` number, since 3 + 6 + 7 + 1 + 2 + 11 + 636 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3582022500 + 89189136 = 59850^2 + 9444^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 101978101 = 3671211636 / (3 + 6 + 7 + 1 + 2 + 1 + 1 + 6 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 3671211636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3671211637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50989015 + ... + 50989086.

Almost surely, 2^3671211636 is an apocalyptic number.

3671211636 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3671211636 is an abundant number, since it is smaller than the sum of its proper divisors (5608795646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3671211636 is a wasteful number, since it uses less digits than its factorization.

3671211636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101978111 (or 101978106 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 3671211636 is about 60590.5243086739. The cubic root of 3671211636 is about 1542.6585376777.

The spelling of 3671211636 in words is "three billion, six hundred seventy-one million, two hundred eleven thousand, six hundred thirty-six".