81122250058 has 8 divisors (see below), whose sum is σ = 121949642052. Its totient is φ = 40472369376.

The previous prime is 81122250049. The next prime is 81122250089. The reversal of 81122250058 is 85005222118.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 57012545529 + 24109704529 = 238773^2 + 155273^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44376685 + ... + 44378512.

Almost surely, 2^81122250058 is an apocalyptic number.

81122250058 is a deficient number, since it is larger than the sum of its proper divisors (40827391994).

81122250058 is a wasteful number, since it uses less digits than its factorization.

81122250058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88755656.

The product of its (nonzero) digits is 12800, while the sum is 34.

The spelling of 81122250058 in words is "eighty-one billion, one hundred twenty-two million, two hundred fifty thousand, fifty-eight".