81030575275558 has 64 divisors (see below), whose sum is σ = 133211713536000. Its totient is φ = 36800764485120.

The previous prime is 81030575275553. The next prime is 81030575275561. The reversal of 81030575275558 is 85557257503018.

It is a happy number.

It is a super-3 number, since 3×81030575275558³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 81030575275496 and 81030575275505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81030575275553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1021152468 + ... + 1021231816.

It is an arithmetic number, because the mean of its divisors is an integer number (2081433024000).

Almost surely, 2^{81030575275558} is an apocalyptic number.

81030575275558 is a deficient number, since it is larger than the sum of its proper divisors (52181138260442).

81030575275558 is a wasteful number, since it uses less digits than its factorization.

81030575275558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82045.

The product of its (nonzero) digits is 58800000, while the sum is 61.

The spelling of 81030575275558 in words is "eighty-one trillion, thirty billion, five hundred seventy-five million, two hundred seventy-five thousand, five hundred fifty-eight".