71900111110001 has 4 divisors (see below), whose sum is σ = 71916374428404. Its totient is φ = 71883847791600.

The previous prime is 71900111109977. The next prime is 71900111110007. The reversal of 71900111110001 is 10001111100917.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27959771290000 + 43940339820001 = 5287700^2 + 6628751^2 .

It is a cyclic number.

It is not a de Polignac number, because 71900111110001 - 2²² = 71900106915697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71900111110007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8131652570 + ... + 8131661411.

It is an arithmetic number, because the mean of its divisors is an integer number (17979093607101).

Almost surely, 2^{71900111110001} is an apocalyptic number.

It is an amenable number.

71900111110001 is a deficient number, since it is larger than the sum of its proper divisors (16263318403).

71900111110001 is a wasteful number, since it uses less digits than its factorization.

71900111110001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16263318402.

The product of its (nonzero) digits is 63, while the sum is 23.

Adding to 71900111110001 its reverse (10001111100917), we get a palindrome (81901222210918).

The spelling of 71900111110001 in words is "seventy-one trillion, nine hundred billion, one hundred eleven million, one hundred ten thousand, one".