81502960 has 160 divisors (see below), whose sum is σ = 240413184. Its totient is φ = 24960000.

The previous prime is 81502943. The next prime is 81502969. The reversal of 81502960 is 6920518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81502969) 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, 622095 + ... + 622225.

Almost surely, 2^81502960 is an apocalyptic number.

81502960 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 81502960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120206592).

81502960 is an abundant number, since it is smaller than the sum of its proper divisors (158910224).

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

81502960 is a wasteful number, since it uses less digits than its factorization.

81502960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 81502960 is about 9027.8989803830. The cubic root of 81502960 is about 433.5685718156.

The spelling of 81502960 in words is "eighty-one million, five hundred two thousand, nine hundred sixty".