81454794 has 32 divisors (see below), whose sum is σ = 173975040. Its totient is φ = 25368000.

The previous prime is 81454777. The next prime is 81454811. The reversal of 81454794 is 49745418.

It is an interprime number because it is at equal distance from previous prime (81454777) and next prime (81454811).

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, 2157 + ... + 12944.

It is an arithmetic number, because the mean of its divisors is an integer number (5436720).

Almost surely, 2^81454794 is an apocalyptic number.

81454794 is an abundant number, since it is smaller than the sum of its proper divisors (92520246).

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

81454794 is a wasteful number, since it uses less digits than its factorization.

81454794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15166.

The product of its digits is 161280, while the sum is 42.

The square root of 81454794 is about 9025.2309665737. The cubic root of 81454794 is about 433.4831459652.

The spelling of 81454794 in words is "eighty-one million, four hundred fifty-four thousand, seven hundred ninety-four".