6615861994392 has 64 divisors (see below), whose sum is σ = 19027644787200. Its totient is φ = 1877728089600.

The previous prime is 6615861994367. The next prime is 6615861994439. The reversal of 6615861994392 is 2934991685166.

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, 130372417 + ... + 130423152.

It is an arithmetic number, because the mean of its divisors is an integer number (297306949800).

Almost surely, 2^{6615861994392} is an apocalyptic number.

It is an amenable number.

6615861994392 is an abundant number, since it is smaller than the sum of its proper divisors (12411782792808).

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

6615861994392 is a wasteful number, since it uses less digits than its factorization.

6615861994392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260795736 (or 260795732 counting only the distinct ones).

The product of its digits is 151165440, while the sum is 69.

The spelling of 6615861994392 in words is "six trillion, six hundred fifteen billion, eight hundred sixty-one million, nine hundred ninety-four thousand, three hundred ninety-two".