71651450158 has 4 divisors (see below), whose sum is σ = 107477175240. Its totient is φ = 35825725078.

The previous prime is 71651450137. The next prime is 71651450159. The reversal of 71651450158 is 85105415617.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85105415617 = 50581 ⋅1682557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71651450159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17912862538 + ... + 17912862541.

It is an arithmetic number, because the mean of its divisors is an integer number (26869293810).

Almost surely, 2^71651450158 is an apocalyptic number.

71651450158 is a deficient number, since it is larger than the sum of its proper divisors (35825725082).

71651450158 is a wasteful number, since it uses less digits than its factorization.

71651450158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35825725081.

The product of its (nonzero) digits is 168000, while the sum is 43.

The spelling of 71651450158 in words is "seventy-one billion, six hundred fifty-one million, four hundred fifty thousand, one hundred fifty-eight".