81301727075 has 54 divisors (see below), whose sum is σ = 105287425236. Its totient is φ = 62271319680.

The previous prime is 81301727051. The next prime is 81301727137. The reversal of 81301727075 is 57072710318.

It is not a de Polignac number, because 81301727075 - 2⁶ = 81301727011 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 545649101 + ... + 545649249.

It is an arithmetic number, because the mean of its divisors is an integer number (1949767134).

Almost surely, 2^81301727075 is an apocalyptic number.

81301727075 is a deficient number, since it is larger than the sum of its proper divisors (23985698161).

81301727075 is a wasteful number, since it uses less digits than its factorization.

81301727075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 41.

The spelling of 81301727075 in words is "eighty-one billion, three hundred one million, seven hundred twenty-seven thousand, seventy-five".