7881117980 has 12 divisors (see below), whose sum is σ = 16550347800. Its totient is φ = 3152447184.

The previous prime is 7881117953. The next prime is 7881117997. The reversal of 7881117980 is 897111887.

It is a super-2 number, since 2×7881117980² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197027930 + ... + 197027969.

It is an arithmetic number, because the mean of its divisors is an integer number (1379195650).

Almost surely, 2^7881117980 is an apocalyptic number.

It is an amenable number.

7881117980 is an abundant number, since it is smaller than the sum of its proper divisors (8669229820).

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

7881117980 is a wasteful number, since it uses less digits than its factorization.

7881117980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394055908 (or 394055906 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 50.

The square root of 7881117980 is about 88775.6609662806. The cubic root of 7881117980 is about 1990.0436831231.

The spelling of 7881117980 in words is "seven billion, eight hundred eighty-one million, one hundred seventeen thousand, nine hundred eighty".