81495936 has 64 divisors (see below), whose sum is σ = 240536400. Its totient is φ = 27164160.

The previous prime is 81495863. The next prime is 81495937. The reversal of 81495936 is 63959418.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 81495891 and 81495900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81495937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8335 + ... + 15246.

Almost surely, 2^81495936 is an apocalyptic number.

It is an amenable number.

81495936 is an abundant number, since it is smaller than the sum of its proper divisors (159040464).

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

81495936 is a wasteful number, since it uses less digits than its factorization.

81495936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23604 (or 23586 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 81495936 is about 9027.5099556855. The cubic root of 81495936 is about 433.5561163451.

The spelling of 81495936 in words is "eighty-one million, four hundred ninety-five thousand, nine hundred thirty-six".