7881439515612 has 48 divisors (see below), whose sum is σ = 19807605401472. Its totient is φ = 2424695555520.

The previous prime is 7881439515589. The next prime is 7881439515613. The reversal of 7881439515612 is 2165159341887.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7881439515613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2731578 + ... + 4819169.

It is an arithmetic number, because the mean of its divisors is an integer number (412658445864).

Almost surely, 2^{7881439515612} is an apocalyptic number.

It is an amenable number.

7881439515612 is an abundant number, since it is smaller than the sum of its proper divisors (11926165885860).

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

7881439515612 is a wasteful number, since it uses less digits than its factorization.

7881439515612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7557458 (or 7557456 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 60.

The spelling of 7881439515612 in words is "seven trillion, eight hundred eighty-one billion, four hundred thirty-nine million, five hundred fifteen thousand, six hundred twelve".