78567876587 has 4 divisors (see below), whose sum is σ = 78618797040. Its totient is φ = 78516956136.

The previous prime is 78567876553. The next prime is 78567876589.

78567876587 is nontrivially palindromic in base 10.

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 78567876587 - 2¹⁶ = 78567811051 is a prime.

It is a super-2 number, since 2×78567876587² (a number of 23 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78567876589) 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, 25457912 + ... + 25460997.

It is an arithmetic number, because the mean of its divisors is an integer number (19654699260).

Almost surely, 2^78567876587 is an apocalyptic number.

78567876587 is a deficient number, since it is larger than the sum of its proper divisors (50920453).

78567876587 is a wasteful number, since it uses less digits than its factorization.

78567876587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50920452.

The product of its digits is 1106380800, while the sum is 74.

The spelling of 78567876587 in words is "seventy-eight billion, five hundred sixty-seven million, eight hundred seventy-six thousand, five hundred eighty-seven".