81496455 has 32 divisors (see below), whose sum is σ = 134072064. Its totient is φ = 42256896.

The previous prime is 81496423. The next prime is 81496483. The reversal of 81496455 is 55469418.

It is not a de Polignac number, because 81496455 - 2⁵ = 81496423 is a prime.

It is a congruent number.

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, 82927 + ... + 83903.

It is an arithmetic number, because the mean of its divisors is an integer number (4189752).

Almost surely, 2^81496455 is an apocalyptic number.

81496455 is a deficient number, since it is larger than the sum of its proper divisors (52575609).

81496455 is a wasteful number, since it uses less digits than its factorization.

81496455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135.

The product of its digits is 172800, while the sum is 42.

The square root of 81496455 is about 9027.5387011078. The cubic root of 81496455 is about 433.5570366983.

The spelling of 81496455 in words is "eighty-one million, four hundred ninety-six thousand, four hundred fifty-five".