81452610 has 96 divisors (see below), whose sum is σ = 226437120. Its totient is φ = 20242944.

The previous prime is 81452537. The next prime is 81452611. The reversal of 81452610 is 1625418.

81452610 is a `hidden beast` number, since 8 + 1 + 45 + 2 + 610 = 666.

It is not an unprimeable number, because it can be changed into a prime (81452611) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 212479 + ... + 212861.

It is an arithmetic number, because the mean of its divisors is an integer number (2358720).

Almost surely, 2^81452610 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81452610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113218560).

81452610 is an abundant number, since it is smaller than the sum of its proper divisors (144984510).

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

81452610 is a wasteful number, since it uses less digits than its factorization.

81452610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 81452610 is about 9025.1099716292. The cubic root of 81452610 is about 433.4792716868.

The spelling of 81452610 in words is "eighty-one million, four hundred fifty-two thousand, six hundred ten".