81495654 has 32 divisors (see below), whose sum is σ = 173352960. Its totient is φ = 25452672.

The previous prime is 81495649. The next prime is 81495677. The reversal of 81495654 is 45659418.

It is a super-3 number, since 3×81495654³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22707 + ... + 26049.

It is an arithmetic number, because the mean of its divisors is an integer number (5417280).

Almost surely, 2^81495654 is an apocalyptic number.

81495654 is an abundant number, since it is smaller than the sum of its proper divisors (91857306).

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

81495654 is a wasteful number, since it uses less digits than its factorization.

81495654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3604.

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

The square root of 81495654 is about 9027.4943367470. The cubic root of 81495654 is about 433.5556162671. Note that the first 3 decimals are identical.

The spelling of 81495654 in words is "eighty-one million, four hundred ninety-five thousand, six hundred fifty-four".