71942106638 has 4 divisors (see below), whose sum is σ = 107913159960. Its totient is φ = 35971053318.

The previous prime is 71942106581. The next prime is 71942106661. The reversal of 71942106638 is 83660124917.

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

It is a junction number, because it is equal to n+sod(n) for n = 71942106592 and 71942106601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17985526658 + ... + 17985526661.

It is an arithmetic number, because the mean of its divisors is an integer number (26978289990).

Almost surely, 2^71942106638 is an apocalyptic number.

71942106638 is a deficient number, since it is larger than the sum of its proper divisors (35971053322).

71942106638 is a wasteful number, since it uses less digits than its factorization.

71942106638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35971053321.

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 71942106638 in words is "seventy-one billion, nine hundred forty-two million, one hundred six thousand, six hundred thirty-eight".