71715906434 has 4 divisors (see below), whose sum is σ = 107573859654. Its totient is φ = 35857953216.

The previous prime is 71715906433. The next prime is 71715906463. The reversal of 71715906434 is 43460951717.

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., 71291670025 + 424236409 = 267005^2 + 20597^2 .

It is not an unprimeable number, because it can be changed into a prime (71715906433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17928976607 + ... + 17928976610.

Almost surely, 2^71715906434 is an apocalyptic number.

71715906434 is a deficient number, since it is larger than the sum of its proper divisors (35857953220).

71715906434 is a wasteful number, since it uses less digits than its factorization.

71715906434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35857953219.

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 71715906434 in words is "seventy-one billion, seven hundred fifteen million, nine hundred six thousand, four hundred thirty-four".