81344123675 has 6 divisors (see below), whose sum is σ = 100866713388. Its totient is φ = 65075298920.

The previous prime is 81344123611. The next prime is 81344123717. The reversal of 81344123675 is 57632144318.

It is a happy number.

It is not a de Polignac number, because 81344123675 - 2⁶ = 81344123611 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1626882449 + ... + 1626882498.

It is an arithmetic number, because the mean of its divisors is an integer number (16811118898).

Almost surely, 2^81344123675 is an apocalyptic number.

81344123675 is a deficient number, since it is larger than the sum of its proper divisors (19522589713).

81344123675 is a wasteful number, since it uses less digits than its factorization.

81344123675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3253764957 (or 3253764952 counting only the distinct ones).

The product of its digits is 483840, while the sum is 44.

The spelling of 81344123675 in words is "eighty-one billion, three hundred forty-four million, one hundred twenty-three thousand, six hundred seventy-five".