81498162432 has 288 divisors, whose sum is σ = 227130849792. Its totient is φ = 25924534272.

The previous prime is 81498162407. The next prime is 81498162437. The reversal of 81498162432 is 23426189418.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81498162437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 413696158 + ... + 413696354.

It is an arithmetic number, because the mean of its divisors is an integer number (788648784).

Almost surely, 2^81498162432 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 81498162432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113565424896).

81498162432 is an abundant number, since it is smaller than the sum of its proper divisors (145632687360).

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

81498162432 is a wasteful number, since it uses less digits than its factorization.

81498162432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493 (or 479 counting only the distinct ones).

The product of its digits is 663552, while the sum is 48.

It can be divided in two parts, 81498 and 162432, that multiplied together give a square (13237883136 = 115056²).

The spelling of 81498162432 in words is "eighty-one billion, four hundred ninety-eight million, one hundred sixty-two thousand, four hundred thirty-two".