81896775622623 has 80 divisors (see below), whose sum is σ = 142432831969120. Its totient is φ = 46455069590784.

The previous prime is 81896775622601. The next prime is 81896775622657. The reversal of 81896775622623 is 32622657769818.

81896775622623 is a `hidden beast` number, since 8 + 18 + 9 + 6 + 7 + 7 + 562 + 26 + 23 = 666.

It is not a de Polignac number, because 81896775622623 - 2¹³ = 81896775614431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81896775622523) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 54576040 + ... + 56056557.

It is an arithmetic number, because the mean of its divisors is an integer number (1780410399614).

Almost surely, 2^{81896775622623} is an apocalyptic number.

81896775622623 is a deficient number, since it is larger than the sum of its proper divisors (60536056346497).

81896775622623 is a wasteful number, since it uses less digits than its factorization.

81896775622623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110632678 (or 110632669 counting only the distinct ones).

The product of its digits is 731566080, while the sum is 72.

The spelling of 81896775622623 in words is "eighty-one trillion, eight hundred ninety-six billion, seven hundred seventy-five million, six hundred twenty-two thousand, six hundred twenty-three".