81028081601 has 8 divisors (see below), whose sum is σ = 83042359680. Its totient is φ = 79038518832.

The previous prime is 81028081583. The next prime is 81028081681. The reversal of 81028081601 is 10618082018.

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

It is a cyclic number.

It is not a de Polignac number, because 81028081601 - 2²² = 81023887297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81028081681) 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, 6172190 + ... + 6185303.

It is an arithmetic number, because the mean of its divisors is an integer number (10380294960).

Almost surely, 2^81028081601 is an apocalyptic number.

It is an amenable number.

81028081601 is a deficient number, since it is larger than the sum of its proper divisors (2014278079).

81028081601 is a wasteful number, since it uses less digits than its factorization.

81028081601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12357655.

The product of its (nonzero) digits is 6144, while the sum is 35.

The spelling of 81028081601 in words is "eighty-one billion, twenty-eight million, eighty-one thousand, six hundred one".