81600486 has 32 divisors (see below), whose sum is σ = 178848000. Its totient is φ = 24614880.

The previous prime is 81600479. The next prime is 81600487. The reversal of 81600486 is 68400618.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81600487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12415 + ... + 17813.

It is an arithmetic number, because the mean of its divisors is an integer number (5589000).

Almost surely, 2^81600486 is an apocalyptic number.

81600486 is an abundant number, since it is smaller than the sum of its proper divisors (97247514).

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

81600486 is a wasteful number, since it uses less digits than its factorization.

81600486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5644.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 81600486 is about 9033.2987330211. The cubic root of 81600486 is about 433.7414381509.

81600486 divided by its sum of digits (33) gives a palindrome (2472742).

The spelling of 81600486 in words is "eighty-one million, six hundred thousand, four hundred eighty-six".