71172136426 has 4 divisors (see below), whose sum is σ = 106758204642. Its totient is φ = 35586068212.

The previous prime is 71172136411. The next prime is 71172136433. The reversal of 71172136426 is 62463127117.

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

It can be written as a sum of positive squares in only one way, i.e., 44324986225 + 26847150201 = 210535^2 + 163851^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17793034105 + ... + 17793034108.

Almost surely, 2^71172136426 is an apocalyptic number.

71172136426 is a deficient number, since it is larger than the sum of its proper divisors (35586068216).

71172136426 is a wasteful number, since it uses less digits than its factorization.

71172136426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35586068215.

The product of its digits is 84672, while the sum is 40.

The spelling of 71172136426 in words is "seventy-one billion, one hundred seventy-two million, one hundred thirty-six thousand, four hundred twenty-six".