6481216036 has 9 divisors (see below), whose sum is σ = 11342409841. Its totient is φ = 3240527512.

The previous prime is 6481216031. The next prime is 6481216039. The reversal of 6481216036 is 6306121846.

It is a happy number.

The square root of 6481216036 is 80506.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 5584572900 + 896643136 = 74730^2 + 29944^2 .

It is a super-2 number, since 2×6481216036² = 84012322610607106592, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6481215986 and 6481216004.

It is not an unprimeable number, because it can be changed into a prime (6481216031) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 140886 + ... + 181138.

Almost surely, 2^6481216036 is an apocalyptic number.

6481216036 is the 80506-th square number.

It is an amenable number.

6481216036 is a deficient number, since it is larger than the sum of its proper divisors (4861193805).

6481216036 is an frugal number, since it uses more digits than its factorization.

6481216036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80510 (or 40255 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The cubic root of 6481216036 is about 1864.4561168518.

The spelling of 6481216036 in words is "six billion, four hundred eighty-one million, two hundred sixteen thousand, thirty-six".