71428650049 has 4 divisors (see below), whose sum is σ = 75630335364. Its totient is φ = 67226964736.

The previous prime is 71428650047. The next prime is 71428650067. The reversal of 71428650049 is 94005682417.

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

It can be written as a sum of positive squares in 2 ways, for example, as 47581569424 + 23847080625 = 218132^2 + 154425^2 .

It is a cyclic number.

It is not a de Polignac number, because 71428650049 - 2¹ = 71428650047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71428649990 and 71428650008.

It is not an unprimeable number, because it can be changed into a prime (71428650047) 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, 2100842632 + ... + 2100842665.

It is an arithmetic number, because the mean of its divisors is an integer number (18907583841).

Almost surely, 2^71428650049 is an apocalyptic number.

It is an amenable number.

71428650049 is a deficient number, since it is larger than the sum of its proper divisors (4201685315).

71428650049 is a wasteful number, since it uses less digits than its factorization.

71428650049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4201685314.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 71428650049 in words is "seventy-one billion, four hundred twenty-eight million, six hundred fifty thousand, forty-nine".