3278861669376 has 220 divisors, whose sum is σ = 9799631135712. Its totient is φ = 1092026437632.

The previous prime is 3278861669359. The next prime is 3278861669381. The reversal of 3278861669376 is 6739661688723.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 101424351 + ... + 101456673.

Almost surely, 2^{3278861669376} is an apocalyptic number.

3278861669376 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3278861669376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4899815567856).

3278861669376 is an abundant number, since it is smaller than the sum of its proper divisors (6520769466336).

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

3278861669376 is a wasteful number, since it uses less digits than its factorization.

3278861669376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33578 (or 33551 counting only the distinct ones).

The product of its digits is 658409472, while the sum is 72.

The spelling of 3278861669376 in words is "three trillion, two hundred seventy-eight billion, eight hundred sixty-one million, six hundred sixty-nine thousand, three hundred seventy-six".