7881757875774 has 128 divisors (see below), whose sum is σ = 18642036833280. Its totient is φ = 2459845158912.

The previous prime is 7881757875749. The next prime is 7881757875781. The reversal of 7881757875774 is 4775787571887.

It is a junction number, because it is equal to n+sod(n) for n = 7881757875693 and 7881757875702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 137901847 + ... + 137958989.

It is an arithmetic number, because the mean of its divisors is an integer number (145640912760).

Almost surely, 2^{7881757875774} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7881757875774, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9321018416640).

7881757875774 is an abundant number, since it is smaller than the sum of its proper divisors (10760278957506).

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

7881757875774 is a wasteful number, since it uses less digits than its factorization.

7881757875774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57951 (or 57945 counting only the distinct ones).

The product of its digits is 6023628800, while the sum is 81.

The spelling of 7881757875774 in words is "seven trillion, eight hundred eighty-one billion, seven hundred fifty-seven million, eight hundred seventy-five thousand, seven hundred seventy-four".