81174380330 has 16 divisors (see below), whose sum is σ = 146117838600. Its totient is φ = 32468873472.

The previous prime is 81174380297. The next prime is 81174380347. The reversal of 81174380330 is 3308347118.

It can be written as a sum of positive squares in 4 ways, for example, as 62145005521 + 19029374809 = 249289^2 + 137947^2 .

It is a super-4 number, since 4×81174380330⁴ (a number of 45 digits) contains 4444 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383846 + ... + 556494.

Almost surely, 2^81174380330 is an apocalyptic number.

81174380330 is a deficient number, since it is larger than the sum of its proper divisors (64943458270).

81174380330 is a wasteful number, since it uses less digits than its factorization.

81174380330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219673.

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 81174380330 in words is "eighty-one billion, one hundred seventy-four million, three hundred eighty thousand, three hundred thirty".