1251433563232 has 48 divisors (see below), whose sum is σ = 2532903633792. Its totient is φ = 608190612480.

The previous prime is 1251433563227. The next prime is 1251433563241. The reversal of 1251433563232 is 2323653341521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 640068 + ... + 1706620.

It is an arithmetic number, because the mean of its divisors is an integer number (52768825704).

Almost surely, 2^{1251433563232} 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 1251433563232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1266451816896).

1251433563232 is an abundant number, since it is smaller than the sum of its proper divisors (1281470070560).

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

1251433563232 is a wasteful number, since it uses less digits than its factorization.

1251433563232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067591 (or 1067583 counting only the distinct ones).

The product of its digits is 388800, while the sum is 40.

The spelling of 1251433563232 in words is "one trillion, two hundred fifty-one billion, four hundred thirty-three million, five hundred sixty-three thousand, two hundred thirty-two".