1231509933472 has 384 divisors, whose sum is σ = 3243276288000. Its totient is φ = 446670360576.

The previous prime is 1231509933469. The next prime is 1231509933523. The reversal of 1231509933472 is 2743399051321.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 407378553 + ... + 407381575.

It is an arithmetic number, because the mean of its divisors is an integer number (8446032000).

Almost surely, 2^{1231509933472} 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 1231509933472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1621638144000).

1231509933472 is an abundant number, since it is smaller than the sum of its proper divisors (2011766354528).

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

1231509933472 is a wasteful number, since it uses less digits than its factorization.

1231509933472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3308 (or 3300 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 49.

The spelling of 1231509933472 in words is "one trillion, two hundred thirty-one billion, five hundred nine million, nine hundred thirty-three thousand, four hundred seventy-two".