71211370994 has 4 divisors (see below), whose sum is σ = 106817056494. Its totient is φ = 35605685496.

The previous prime is 71211370981. The next prime is 71211371017. The reversal of 71211370994 is 49907311217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49907311217 = 24077 ⋅2072821.

It can be written as a sum of positive squares in only one way, i.e., 37621645369 + 33589725625 = 193963^2 + 183275^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17802842747 + ... + 17802842750.

Almost surely, 2^71211370994 is an apocalyptic number.

71211370994 is a deficient number, since it is larger than the sum of its proper divisors (35605685500).

71211370994 is a wasteful number, since it uses less digits than its factorization.

71211370994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35605685499.

The product of its (nonzero) digits is 95256, while the sum is 44.

The spelling of 71211370994 in words is "seventy-one billion, two hundred eleven million, three hundred seventy thousand, nine hundred ninety-four".