81750443027 has 16 divisors (see below), whose sum is σ = 90099247104. Its totient is φ = 73555020000.

The previous prime is 81750443023. The next prime is 81750443041. The reversal of 81750443027 is 72034405718.

It is not a de Polignac number, because 81750443027 - 2² = 81750443023 is a prime.

It is a super-2 number, since 2×81750443027² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81750443023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3288398 + ... + 3313164.

It is an arithmetic number, because the mean of its divisors is an integer number (5631202944).

Almost surely, 2^81750443027 is an apocalyptic number.

81750443027 is a deficient number, since it is larger than the sum of its proper divisors (8348804077).

81750443027 is a wasteful number, since it uses less digits than its factorization.

81750443027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27850.

The product of its (nonzero) digits is 188160, while the sum is 41.

The spelling of 81750443027 in words is "eighty-one billion, seven hundred fifty million, four hundred forty-three thousand, twenty-seven".