81735241535 has 8 divisors (see below), whose sum is σ = 99463730976. Its totient is φ = 64467232480.

The previous prime is 81735241531. The next prime is 81735241559. The reversal of 81735241535 is 53514253718.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81735241535 - 2² = 81735241531 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81735241531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115119704 + ... + 115120413.

It is an arithmetic number, because the mean of its divisors is an integer number (12432966372).

Almost surely, 2^81735241535 is an apocalyptic number.

81735241535 is a deficient number, since it is larger than the sum of its proper divisors (17728489441).

81735241535 is a wasteful number, since it uses less digits than its factorization.

81735241535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230240193.

The product of its digits is 504000, while the sum is 44.

The spelling of 81735241535 in words is "eighty-one billion, seven hundred thirty-five million, two hundred forty-one thousand, five hundred thirty-five".