81235003927 has 12 divisors (see below), whose sum is σ = 103088577096. Its totient is φ = 63300002640.

The previous prime is 81235003909. The next prime is 81235003943. The reversal of 81235003927 is 72930053218.

It is not a de Polignac number, because 81235003927 - 2⁷ = 81235003799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81235003927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81235003327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75356608 + ... + 75357685.

It is an arithmetic number, because the mean of its divisors is an integer number (8590714758).

Almost surely, 2^81235003927 is an apocalyptic number.

81235003927 is a deficient number, since it is larger than the sum of its proper divisors (21853573169).

81235003927 is a wasteful number, since it uses less digits than its factorization.

81235003927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150714318 (or 150714311 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 81235003927 in words is "eighty-one billion, two hundred thirty-five million, three thousand, nine hundred twenty-seven".