81493002101 has 16 divisors (see below), whose sum is σ = 94199915520. Its totient is φ = 69052663680.

The previous prime is 81493002083. The next prime is 81493002137. The reversal of 81493002101 is 10120039418.

It is not a de Polignac number, because 81493002101 - 2⁶ = 81493002037 is a prime.

It is a super-2 number, since 2×81493002101² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81493002181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4299836 + ... + 4318746.

It is an arithmetic number, because the mean of its divisors is an integer number (5887494720).

Almost surely, 2^81493002101 is an apocalyptic number.

It is an amenable number.

81493002101 is a deficient number, since it is larger than the sum of its proper divisors (12706913419).

81493002101 is a wasteful number, since it uses less digits than its factorization.

81493002101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25924.

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 81493002101 in words is "eighty-one billion, four hundred ninety-three million, two thousand, one hundred one".