87158522879 has 4 divisors (see below), whose sum is σ = 89012959584. Its totient is φ = 85304086176.

The previous prime is 87158522851. The next prime is 87158522897. The reversal of 87158522879 is 97822585178.

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-87158522879 is a prime.

It is a super-2 number, since 2×87158522879² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87158522809) 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, 927218282 + ... + 927218375.

It is an arithmetic number, because the mean of its divisors is an integer number (22253239896).

Almost surely, 2^87158522879 is an apocalyptic number.

87158522879 is a deficient number, since it is larger than the sum of its proper divisors (1854436705).

87158522879 is a wasteful number, since it uses less digits than its factorization.

87158522879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854436704.

The product of its digits is 22579200, while the sum is 62.

The spelling of 87158522879 in words is "eighty-seven billion, one hundred fifty-eight million, five hundred twenty-two thousand, eight hundred seventy-nine".