71202649849 has 4 divisors (see below), whose sum is σ = 71203374736. Its totient is φ = 71201924964.

The previous prime is 71202649841. The next prime is 71202649879. The reversal of 71202649849 is 94894620217.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 71202649849 - 2³ = 71202649841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71202649796 and 71202649805.

It is not an unprimeable number, because it can be changed into a prime (71202649841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186699 + ... + 421024.

It is an arithmetic number, because the mean of its divisors is an integer number (17800843684).

Almost surely, 2^71202649849 is an apocalyptic number.

It is an amenable number.

71202649849 is a deficient number, since it is larger than the sum of its proper divisors (724887).

71202649849 is a wasteful number, since it uses less digits than its factorization.

71202649849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724886.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 71202649849 in words is "seventy-one billion, two hundred two million, six hundred forty-nine thousand, eight hundred forty-nine".