3257645634816 has 144 divisors (see below), whose sum is σ = 8771262837120. Its totient is φ = 1073264066560.

The previous prime is 3257645634799. The next prime is 3257645634851. The reversal of 3257645634816 is 6184365467523.

It is a happy number.

It is a super-2 number, since 2×3257645634816² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3257645634816.

It is a congruent number.

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, 31103176 + ... + 31207736.

It is an arithmetic number, because the mean of its divisors is an integer number (60911547480).

Almost surely, 2^{3257645634816} 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 3257645634816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4385631418560).

3257645634816 is an abundant number, since it is smaller than the sum of its proper divisors (5513617202304).

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

3257645634816 is a wasteful number, since it uses less digits than its factorization.

3257645634816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105052 (or 105038 counting only the distinct ones).

The product of its digits is 87091200, while the sum is 60.

The spelling of 3257645634816 in words is "three trillion, two hundred fifty-seven billion, six hundred forty-five million, six hundred thirty-four thousand, eight hundred sixteen".