3721717636 has 48 divisors (see below), whose sum is σ = 8021260800. Its totient is φ = 1471363200.

The previous prime is 3721717627. The next prime is 3721717667. The reversal of 3721717636 is 6367171273.

It is a super-2 number, since 2×3721717636² = 27702364324226856992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3721717592 and 3721717601.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 853590 + ... + 857938.

It is an arithmetic number, because the mean of its divisors is an integer number (167109600).

Almost surely, 2^3721717636 is an apocalyptic number.

It is an amenable number.

3721717636 is an abundant number, since it is smaller than the sum of its proper divisors (4299543164).

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

3721717636 is a wasteful number, since it uses less digits than its factorization.

3721717636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6724 (or 6722 counting only the distinct ones).

The product of its digits is 222264, while the sum is 43.

The square root of 3721717636 is about 61005.8819787076. The cubic root of 3721717636 is about 1549.7006200840.

The spelling of 3721717636 in words is "three billion, seven hundred twenty-one million, seven hundred seventeen thousand, six hundred thirty-six".