1209348251904 has 216 divisors, whose sum is σ = 3510388247520. Its totient is φ = 369424613376.

The previous prime is 1209348251873. The next prime is 1209348251957. The reversal of 1209348251904 is 4091528439021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18007572 + ... + 18074604.

Almost surely, 2^{1209348251904} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1209348251904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1755194123760).

1209348251904 is an abundant number, since it is smaller than the sum of its proper divisors (2301039995616).

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

1209348251904 is a wasteful number, since it uses less digits than its factorization.

1209348251904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67217 (or 67190 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 1209348251904 in words is "one trillion, two hundred nine billion, three hundred forty-eight million, two hundred fifty-one thousand, nine hundred four".