1251423116532 has 192 divisors, whose sum is σ = 3354889789440. Its totient is φ = 403193261952.

The previous prime is 1251423116473. The next prime is 1251423116533. The reversal of 1251423116532 is 2356113241521.

1251423116532 is a `hidden beast` number, since 1 + 2 + 5 + 1 + 4 + 2 + 3 + 116 + 532 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251423116533) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 133082943 + ... + 133092345.

It is an arithmetic number, because the mean of its divisors is an integer number (17473384320).

Almost surely, 2^{1251423116532} is an apocalyptic number.

1251423116532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1251423116532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1677444894720).

1251423116532 is an abundant number, since it is smaller than the sum of its proper divisors (2103466672908).

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

1251423116532 is a wasteful number, since it uses less digits than its factorization.

1251423116532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9787 (or 9779 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The spelling of 1251423116532 in words is "one trillion, two hundred fifty-one billion, four hundred twenty-three million, one hundred sixteen thousand, five hundred thirty-two".