2801787668 has 6 divisors (see below), whose sum is σ = 4903128426. Its totient is φ = 1400893832.

The previous prime is 2801787649. The next prime is 2801787683. The reversal of 2801787668 is 8667871082.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2588977924 + 212809744 = 50882^2 + 14588^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 350223455 + ... + 350223462.

It is an arithmetic number, because the mean of its divisors is an integer number (817188071).

Almost surely, 2^2801787668 is an apocalyptic number.

It is an amenable number.

2801787668 is a deficient number, since it is larger than the sum of its proper divisors (2101340758).

2801787668 is a wasteful number, since it uses less digits than its factorization.

2801787668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700446921 (or 700446919 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 53.

The square root of 2801787668 is about 52931.9154008241. The cubic root of 2801787668 is about 1409.7596404667.

The spelling of 2801787668 in words is "two billion, eight hundred one million, seven hundred eighty-seven thousand, six hundred sixty-eight".