1231355576664 has 96 divisors (see below), whose sum is σ = 3398980384800. Its totient is φ = 402572851200.

The previous prime is 1231355576639. The next prime is 1231355576713. The reversal of 1231355576664 is 4666755531321.

It is a self number, because there is not a number n which added to its sum of digits gives 1231355576664.

It is a congruent number.

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, 11697064 + ... + 11801864.

It is an arithmetic number, because the mean of its divisors is an integer number (35406045675).

Almost surely, 2^{1231355576664} 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 1231355576664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1699490192400).

1231355576664 is an abundant number, since it is smaller than the sum of its proper divisors (2167624808136).

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

1231355576664 is a wasteful number, since it uses less digits than its factorization.

1231355576664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107945 (or 107938 counting only the distinct ones).

The product of its digits is 13608000, while the sum is 54.

The spelling of 1231355576664 in words is "one trillion, two hundred thirty-one billion, three hundred fifty-five million, five hundred seventy-six thousand, six hundred sixty-four".