1261318954424 has 16 divisors (see below), whose sum is σ = 2366225038800. Its totient is φ = 630325610752.

The previous prime is 1261318954411. The next prime is 1261318954459. The reversal of 1261318954424 is 4244598131621.

It is a congruent number.

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, 41717252 + ... + 41747475.

It is an arithmetic number, because the mean of its divisors is an integer number (147889064925).

Almost surely, 2^{1261318954424} is an apocalyptic number.

It is an amenable number.

1261318954424 is a deficient number, since it is larger than the sum of its proper divisors (1104906084376).

1261318954424 is a wasteful number, since it uses less digits than its factorization.

1261318954424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83466622 (or 83466618 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 50.

The spelling of 1261318954424 in words is "one trillion, two hundred sixty-one billion, three hundred eighteen million, nine hundred fifty-four thousand, four hundred twenty-four".