871015957979 has 4 divisors (see below), whose sum is σ = 871068284760. Its totient is φ = 870963631200.

The previous prime is 871015957951. The next prime is 871015958047. The reversal of 871015957979 is 979759510178.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-871015957979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (871015957579) 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, 26138414 + ... + 26171715.

It is an arithmetic number, because the mean of its divisors is an integer number (217767071190).

Almost surely, 2^871015957979 is an apocalyptic number.

871015957979 is a deficient number, since it is larger than the sum of its proper divisors (52326781).

871015957979 is a wasteful number, since it uses less digits than its factorization.

871015957979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52326780.

The product of its (nonzero) digits is 50009400, while the sum is 68.

The spelling of 871015957979 in words is "eight hundred seventy-one billion, fifteen million, nine hundred fifty-seven thousand, nine hundred seventy-nine".