81733857454296 has 24 divisors (see below), whose sum is σ = 221362530605580. Its totient is φ = 27244619151408.

The previous prime is 81733857454247. The next prime is 81733857454307. The reversal of 81733857454296 is 69245475833718.

81733857454296 is a `hidden beast` number, since 8 + 1 + 7 + 3 + 3 + 8 + 5 + 74 + 542 + 9 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (72), and also a Moran number because the ratio is a prime number: 1135192464643 = 81733857454296 / (8 + 1 + 7 + 3 + 3 + 8 + 5 + 7 + 4 + 5 + 4 + 2 + 9 + 6).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 567596232250 + ... + 567596232393.

Almost surely, 2^{81733857454296} is an apocalyptic number.

It is an amenable number.

81733857454296 is an abundant number, since it is smaller than the sum of its proper divisors (139628673151284).

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

81733857454296 is a wasteful number, since it uses less digits than its factorization.

81733857454296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135192464655 (or 1135192464648 counting only the distinct ones).

The product of its digits is 1219276800, while the sum is 72.

The spelling of 81733857454296 in words is "eighty-one trillion, seven hundred thirty-three billion, eight hundred fifty-seven million, four hundred fifty-four thousand, two hundred ninety-six".