87543834578 has 4 divisors (see below), whose sum is σ = 131315751870. Its totient is φ = 43771917288.

The previous prime is 87543834563. The next prime is 87543834583.

87543834578 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in only one way, i.e., 73927978609 + 13615855969 = 271897^2 + 116687^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 87543834578.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21885958643 + ... + 21885958646.

Almost surely, 2^87543834578 is an apocalyptic number.

87543834578 is a deficient number, since it is larger than the sum of its proper divisors (43771917292).

87543834578 is a wasteful number, since it uses less digits than its factorization.

87543834578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43771917291.

The product of its digits is 90316800, while the sum is 62.

The spelling of 87543834578 in words is "eighty-seven billion, five hundred forty-three million, eight hundred thirty-four thousand, five hundred seventy-eight".