8181782062428 has 96 divisors (see below), whose sum is σ = 20725701068800. Its totient is φ = 2512030352832.

The previous prime is 8181782062423. The next prime is 8181782062429. The reversal of 8181782062428 is 8242602871818.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8181782062423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11871393 + ... + 12541671.

Almost surely, 2^{8181782062428} 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 8181782062428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10362850534400).

8181782062428 is an abundant number, since it is smaller than the sum of its proper divisors (12543919006372).

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

8181782062428 is a wasteful number, since it uses less digits than its factorization.

8181782062428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670788 (or 670760 counting only the distinct ones).

The product of its (nonzero) digits is 5505024, while the sum is 57.

The spelling of 8181782062428 in words is "eight trillion, one hundred eighty-one billion, seven hundred eighty-two million, sixty-two thousand, four hundred twenty-eight".