1992279170868 has 192 divisors, whose sum is σ = 6059187929088. Its totient is φ = 495915171840.

The previous prime is 1992279170839. The next prime is 1992279170887. The reversal of 1992279170868 is 8680719722991.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (69).

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, 39796 + ... + 1996532.

It is an arithmetic number, because the mean of its divisors is an integer number (31558270464).

Almost surely, 2^{1992279170868} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1992279170868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3029593964544).

1992279170868 is an abundant number, since it is smaller than the sum of its proper divisors (4066908758220).

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

1992279170868 is a wasteful number, since it uses less digits than its factorization.

1992279170868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1956822 (or 1956820 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 69.

The spelling of 1992279170868 in words is "one trillion, nine hundred ninety-two billion, two hundred seventy-nine million, one hundred seventy thousand, eight hundred sixty-eight".