81770043074832 has 120 divisors (see below), whose sum is σ = 263100418578816. Its totient is φ = 23222971980288.

The previous prime is 81770043074777. The next prime is 81770043074849. The reversal of 81770043074832 is 23847034007718.

81770043074832 is a `hidden beast` number, since 8 + 177 + 0 + 0 + 430 + 7 + 4 + 8 + 32 = 666.

It is a super-3 number, since 3×81770043074832³ (a number of 43 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 242709133 + ... + 243045804.

Almost surely, 2^{81770043074832} is an apocalyptic number.

It is an amenable number.

81770043074832 is an abundant number, since it is smaller than the sum of its proper divisors (181330375503984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81770043074832 is a wasteful number, since it uses less digits than its factorization.

81770043074832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485755125 (or 485755116 counting only the distinct ones).

The product of its (nonzero) digits is 6322176, while the sum is 54.

The spelling of 81770043074832 in words is "eighty-one trillion, seven hundred seventy billion, forty-three million, seventy-four thousand, eight hundred thirty-two".