81073593501 has 32 divisors (see below), whose sum is σ = 113101148160. Its totient is φ = 51617127744.

The previous prime is 81073593439. The next prime is 81073593563. The reversal of 81073593501 is 10539537018.

It is an interprime number because it is at equal distance from previous prime (81073593439) and next prime (81073593563).

It is not a de Polignac number, because 81073593501 - 2¹⁸ = 81073331357 is a prime.

It is a super-3 number, since 3×81073593501³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81073593581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1011055 + ... + 1088291.

It is an arithmetic number, because the mean of its divisors is an integer number (3534410880).

Almost surely, 2^81073593501 is an apocalyptic number.

It is an amenable number.

81073593501 is a deficient number, since it is larger than the sum of its proper divisors (32027554659).

81073593501 is a wasteful number, since it uses less digits than its factorization.

81073593501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77465.

The product of its (nonzero) digits is 113400, while the sum is 42.

The spelling of 81073593501 in words is "eighty-one billion, seventy-three million, five hundred ninety-three thousand, five hundred one".