81342088769576 has 32 divisors (see below), whose sum is σ = 158126996745000. Its totient is φ = 39181136633856.

The previous prime is 81342088769569. The next prime is 81342088769621. The reversal of 81342088769576 is 67596788024318.

It can be written as a sum of positive squares in 4 ways, for example, as 75838494760900 + 5503594008676 = 8708530^2 + 2345974^2 .

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, 390332861 + ... + 390541196.

It is a 1-persistent number, because it is pandigital, but 2⋅81342088769576 = 162684177539152 is not.

Almost surely, 2^{81342088769576} is an apocalyptic number.

It is an amenable number.

81342088769576 is a deficient number, since it is larger than the sum of its proper divisors (76784907975424).

81342088769576 is a wasteful number, since it uses less digits than its factorization.

81342088769576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780874541 (or 780874537 counting only the distinct ones).

The product of its (nonzero) digits is 975421440, while the sum is 74.

The spelling of 81342088769576 in words is "eighty-one trillion, three hundred forty-two billion, eighty-eight million, seven hundred sixty-nine thousand, five hundred seventy-six".