3671636836 has 72 divisors (see below), whose sum is σ = 8080739520. Its totient is φ = 1450395072.

The previous prime is 3671636831. The next prime is 3671636867. The reversal of 3671636836 is 6386361763.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 3671636836.

It is not an unprimeable number, because it can be changed into a prime (3671636831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124465 + ... + 151111.

Almost surely, 2^3671636836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3671636836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4040369760).

3671636836 is an abundant number, since it is smaller than the sum of its proper divisors (4409102684).

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

3671636836 is a wasteful number, since it uses less digits than its factorization.

3671636836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26721 (or 26712 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 49.

The square root of 3671636836 is about 60594.0330065593. The cubic root of 3671636836 is about 1542.7180923201.

The spelling of 3671636836 in words is "three billion, six hundred seventy-one million, six hundred thirty-six thousand, eight hundred thirty-six".