3265720778880 has 1024 divisors, whose sum is σ = 13477415040000. Its totient is φ = 741109284864.

The previous prime is 3265720778857. The next prime is 3265720778909. The reversal of 3265720778880 is 888770275623.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1459865122 + ... + 1459867358.

It is an arithmetic number, because the mean of its divisors is an integer number (13161538125).

Almost surely, 2^{3265720778880} is an apocalyptic number.

3265720778880 is a gapful number since it is divisible by the number (30) 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 3265720778880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6738707520000).

3265720778880 is an abundant number, since it is smaller than the sum of its proper divisors (10211694261120).

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

3265720778880 is an equidigital number, since it uses as much as digits as its factorization.

3265720778880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433 (or 2403 counting only the distinct ones).

The product of its (nonzero) digits is 63221760, while the sum is 63.

The spelling of 3265720778880 in words is "three trillion, two hundred sixty-five billion, seven hundred twenty million, seven hundred seventy-eight thousand, eight hundred eighty".