1201209955608 has 128 divisors (see below), whose sum is σ = 3346508390400. Its totient is φ = 356755370496.

The previous prime is 1201209955591. The next prime is 1201209955639. The reversal of 1201209955608 is 8065599021021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34935241 + ... + 34969607.

It is an arithmetic number, because the mean of its divisors is an integer number (26144596800).

Almost surely, 2^{1201209955608} 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 1201209955608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1673254195200).

1201209955608 is an abundant number, since it is smaller than the sum of its proper divisors (2145298434792).

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

1201209955608 is a wasteful number, since it uses less digits than its factorization.

1201209955608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38281 (or 38277 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 48.

The spelling of 1201209955608 in words is "one trillion, two hundred one billion, two hundred nine million, nine hundred fifty-five thousand, six hundred eight".