3681020826 has 36 divisors (see below), whose sum is σ = 9277677162. Its totient is φ = 1051719984.

The previous prime is 3681020789. The next prime is 3681020843. The reversal of 3681020826 is 6280201863.

It can be written as a sum of positive squares in only one way, i.e., 3298779225 + 382241601 = 57435^2 + 19551^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2085865 + ... + 2087628.

Almost surely, 2^3681020826 is an apocalyptic number.

3681020826 is an abundant number, since it is smaller than the sum of its proper divisors (5596656336).

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

3681020826 is a wasteful number, since it uses less digits than its factorization.

3681020826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4173515 (or 4173505 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 3681020826 is about 60671.4168781313. The cubic root of 3681020826 is about 1544.0312700608.

The spelling of 3681020826 in words is "three billion, six hundred eighty-one million, twenty thousand, eight hundred twenty-six".