81015450101 has 8 divisors (see below), whose sum is σ = 81120427008. Its totient is φ = 80910522000.

The previous prime is 81015450091. The next prime is 81015450143. The reversal of 81015450101 is 10105451018.

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 81015450101 - 2²² = 81011255797 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 (81015450161) 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, 4222991 + ... + 4242131.

It is an arithmetic number, because the mean of its divisors is an integer number (10140053376).

Almost surely, 2^81015450101 is an apocalyptic number.

It is an amenable number.

81015450101 is a deficient number, since it is larger than the sum of its proper divisors (104976907).

81015450101 is a wasteful number, since it uses less digits than its factorization.

81015450101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24403.

The product of its (nonzero) digits is 800, while the sum is 26.

The spelling of 81015450101 in words is "eighty-one billion, fifteen million, four hundred fifty thousand, one hundred one".