81254154240 has 704 divisors, whose sum is σ = 338228593920. Its totient is φ = 18119393280.

The previous prime is 81254154239. The next prime is 81254154259. The reversal of 81254154240 is 4245145218.

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

It is a junction number, because it is equal to n+sod(n) for n = 81254154195 and 81254154204.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1981808620 + ... + 1981808660.

Almost surely, 2^81254154240 is an apocalyptic number.

81254154240 is a gapful number since it is divisible by the number (80) 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 81254154240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169114296960).

81254154240 is an abundant number, since it is smaller than the sum of its proper divisors (256974439680).

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

81254154240 is an frugal number, since it uses more digits than its factorization.

81254154240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

Adding to 81254154240 its reverse (4245145218), we get a palindrome (85499299458).

The spelling of 81254154240 in words is "eighty-one billion, two hundred fifty-four million, one hundred fifty-four thousand, two hundred forty".