3311778581388 has 36 divisors (see below), whose sum is σ = 8371690989480. Its totient is φ = 1103893136256.

The previous prime is 3311778581387. The next prime is 3311778581401. The reversal of 3311778581388 is 8831858771133.

It is a happy number.

3311778581388 is a `hidden beast` number, since 3 + 3 + 1 + 17 + 7 + 8 + 581 + 38 + 8 = 666.

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

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (3311778581387) 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, 143370 + ... + 2577617.

It is an arithmetic number, because the mean of its divisors is an integer number (232546971930).

Almost surely, 2^{3311778581388} is an apocalyptic number.

It is an amenable number.

3311778581388 is an abundant number, since it is smaller than the sum of its proper divisors (5059912408092).

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

3311778581388 is a wasteful number, since it uses less digits than its factorization.

3311778581388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754806 (or 2754801 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 63.

The spelling of 3311778581388 in words is "three trillion, three hundred eleven billion, seven hundred seventy-eight million, five hundred eighty-one thousand, three hundred eighty-eight".