71681211038 has 4 divisors (see below), whose sum is σ = 107521816560. Its totient is φ = 35840605518.

The previous prime is 71681211037. The next prime is 71681211089. The reversal of 71681211038 is 83011218617.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83011218617 = 109 ⋅761570813.

It is a junction number, because it is equal to n+sod(n) for n = 71681210992 and 71681211010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71681211037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17920302758 + ... + 17920302761.

It is an arithmetic number, because the mean of its divisors is an integer number (26880454140).

Almost surely, 2^71681211038 is an apocalyptic number.

71681211038 is a deficient number, since it is larger than the sum of its proper divisors (35840605522).

71681211038 is a wasteful number, since it uses less digits than its factorization.

71681211038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35840605521.

The product of its (nonzero) digits is 16128, while the sum is 38.

The spelling of 71681211038 in words is "seventy-one billion, six hundred eighty-one million, two hundred eleven thousand, thirty-eight".