81458817356026 has 8 divisors (see below), whose sum is σ = 133296246582624. Its totient is φ = 37026735161820.

The previous prime is 81458817356023. The next prime is 81458817356057. The reversal of 81458817356026 is 62065371885418.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (81458817356023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1851336758070 + ... + 1851336758113.

It is an arithmetic number, because the mean of its divisors is an integer number (16662030822828).

Almost surely, 2^{81458817356026} is an apocalyptic number.

81458817356026 is a deficient number, since it is larger than the sum of its proper divisors (51837429226598).

81458817356026 is a wasteful number, since it uses less digits than its factorization.

81458817356026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3702673516196.

The product of its (nonzero) digits is 77414400, while the sum is 64.

The spelling of 81458817356026 in words is "eighty-one trillion, four hundred fifty-eight billion, eight hundred seventeen million, three hundred fifty-six thousand, twenty-six".