3213648756 has 36 divisors (see below), whose sum is σ = 8424258752. Its totient is φ = 1071215928.

The previous prime is 3213648751. The next prime is 3213648797. The reversal of 3213648756 is 6578463123.

3213648756 is a `hidden beast` number, since 32 + 136 + 487 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3213648751) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1652140 + ... + 1654083.

Almost surely, 2^3213648756 is an apocalyptic number.

3213648756 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3213648756 is an abundant number, since it is smaller than the sum of its proper divisors (5210609996).

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

3213648756 is a wasteful number, since it uses less digits than its factorization.

3213648756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3306242 (or 3306228 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 3213648756 is about 56689.0532289965. The cubic root of 3213648756 is about 1475.7047297520.

The spelling of 3213648756 in words is "three billion, two hundred thirteen million, six hundred forty-eight thousand, seven hundred fifty-six".