87711949571 has 8 divisors (see below), whose sum is σ = 89717505024. Its totient is φ = 85712200200.

The previous prime is 87711949561. The next prime is 87711949573. The reversal of 87711949571 is 17594911778.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87711949571 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87711949571.

It is not an unprimeable number, because it can be changed into a prime (87711949573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1420955 + ... + 1481396.

It is an arithmetic number, because the mean of its divisors is an integer number (11214688128).

Almost surely, 2^87711949571 is an apocalyptic number.

87711949571 is a deficient number, since it is larger than the sum of its proper divisors (2005555453).

87711949571 is a wasteful number, since it uses less digits than its factorization.

87711949571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2903041.

The product of its digits is 4445280, while the sum is 59.

The spelling of 87711949571 in words is "eighty-seven billion, seven hundred eleven million, nine hundred forty-nine thousand, five hundred seventy-one".