2686697920242 has 96 divisors (see below), whose sum is σ = 6943328750592. Its totient is φ = 734115156192.

The previous prime is 2686697920223. The next prime is 2686697920267. The reversal of 2686697920242 is 2420297966862.

2686697920242 is a `hidden beast` number, since 268 + 6 + 69 + 79 + 2 + 0 + 242 = 666.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 2686697920242.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15875113 + ... + 16043459.

It is an arithmetic number, because the mean of its divisors is an integer number (72326341152).

Almost surely, 2^{2686697920242} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2686697920242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3471664375296).

2686697920242 is an abundant number, since it is smaller than the sum of its proper divisors (4256630830350).

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

2686697920242 is a wasteful number, since it uses less digits than its factorization.

2686697920242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173892 (or 173889 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 63.

The spelling of 2686697920242 in words is "two trillion, six hundred eighty-six billion, six hundred ninety-seven million, nine hundred twenty thousand, two hundred forty-two".