2689721106020 has 24 divisors (see below), whose sum is σ = 6082907732664. Its totient is φ = 993127792896.

The previous prime is 2689721106001. The next prime is 2689721106067. The reversal of 2689721106020 is 206011279862.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16698842176 + 2673022263844 = 129224^2 + 1634938^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5172540329 + ... + 5172540848.

It is an arithmetic number, because the mean of its divisors is an integer number (253454488861).

Almost surely, 2^{2689721106020} is an apocalyptic number.

2689721106020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2689721106020 is an abundant number, since it is smaller than the sum of its proper divisors (3393186626644).

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

2689721106020 is a wasteful number, since it uses less digits than its factorization.

2689721106020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10345081199 (or 10345081197 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 2689721106020 in words is "two trillion, six hundred eighty-nine billion, seven hundred twenty-one million, one hundred six thousand, twenty".