81264345750351 has 6 divisors (see below), whose sum is σ = 117381832750520. Its totient is φ = 54176230500228.

The previous prime is 81264345750331. The next prime is 81264345750397. The reversal of 81264345750351 is 15305754346218.

It is a happy number.

81264345750351 is a `hidden beast` number, since 8 + 1 + 2 + 6 + 4 + 34 + 57 + 503 + 51 = 666.

It is not a de Polignac number, because 81264345750351 - 2⁷ = 81264345750223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81264345750331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4514685875011 + ... + 4514685875028.

Almost surely, 2^{81264345750351} is an apocalyptic number.

81264345750351 is a deficient number, since it is larger than the sum of its proper divisors (36117487000169).

81264345750351 is a wasteful number, since it uses less digits than its factorization.

81264345750351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9029371750045 (or 9029371750042 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 54.

The spelling of 81264345750351 in words is "eighty-one trillion, two hundred sixty-four billion, three hundred forty-five million, seven hundred fifty thousand, three hundred fifty-one".