81094687045633 has 4 divisors (see below), whose sum is σ = 81733227888640. Its totient is φ = 80456146202628.

The previous prime is 81094687045613. The next prime is 81094687045643. The reversal of 81094687045633 is 33654078649018.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 81094687045633 - 2⁵ = 81094687045601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81094687045613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319270421313 + ... + 319270421566.

It is an arithmetic number, because the mean of its divisors is an integer number (20433306972160).

Almost surely, 2^{81094687045633} is an apocalyptic number.

It is an amenable number.

81094687045633 is a deficient number, since it is larger than the sum of its proper divisors (638540843007).

81094687045633 is a wasteful number, since it uses less digits than its factorization.

81094687045633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638540843006.

The product of its (nonzero) digits is 104509440, while the sum is 64.

The spelling of 81094687045633 in words is "eighty-one trillion, ninety-four billion, six hundred eighty-seven million, forty-five thousand, six hundred thirty-three".