9798156271 has 4 divisors (see below), whose sum is σ = 9936158544. Its totient is φ = 9660154000.

The previous prime is 9798156233. The next prime is 9798156283. The reversal of 9798156271 is 1726518979.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 9798156271 - 2¹³ = 9798148079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9798156971) 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, 69001030 + ... + 69001171.

It is an arithmetic number, because the mean of its divisors is an integer number (2484039636).

Almost surely, 2^9798156271 is an apocalyptic number.

9798156271 is a deficient number, since it is larger than the sum of its proper divisors (138002273).

9798156271 is a wasteful number, since it uses less digits than its factorization.

9798156271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138002272.

The product of its digits is 1905120, while the sum is 55.

The square root of 9798156271 is about 98985.6366903805. The cubic root of 9798156271 is about 2139.8407508801.

The spelling of 9798156271 in words is "nine billion, seven hundred ninety-eight million, one hundred fifty-six thousand, two hundred seventy-one".