1261335444004 has 12 divisors (see below), whose sum is σ = 2207508321564. Its totient is φ = 630618780704.

The previous prime is 1261335443959. The next prime is 1261335444023. The reversal of 1261335444004 is 4004445331621.

It can be written as a sum of positive squares in 2 ways, for example, as 852889190400 + 408446253604 = 923520^2 + 639098^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12177307 + ... + 12280450.

It is an arithmetic number, because the mean of its divisors is an integer number (183959026797).

Almost surely, 2^{1261335444004} is an apocalyptic number.

It is an amenable number.

1261335444004 is a deficient number, since it is larger than the sum of its proper divisors (946172877560).

1261335444004 is a wasteful number, since it uses less digits than its factorization.

1261335444004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24470654 (or 24470652 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 1261335444004 in words is "one trillion, two hundred sixty-one billion, three hundred thirty-five million, four hundred forty-four thousand, four".