87854989345 has 4 divisors (see below), whose sum is σ = 105425987220. Its totient is φ = 70283991472.

The previous prime is 87854989309. The next prime is 87854989351. The reversal of 87854989345 is 54398945878.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33207043984 + 54647945361 = 182228^2 + 233769^2 .

It is a cyclic number.

It is not a de Polignac number, because 87854989345 - 2⁷ = 87854989217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8785498930 + ... + 8785498939.

It is an arithmetic number, because the mean of its divisors is an integer number (26356496805).

Almost surely, 2^87854989345 is an apocalyptic number.

It is an amenable number.

87854989345 is a deficient number, since it is larger than the sum of its proper divisors (17570997875).

87854989345 is a wasteful number, since it uses less digits than its factorization.

87854989345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17570997874.

The product of its digits is 348364800, while the sum is 70.

The spelling of 87854989345 in words is "eighty-seven billion, eight hundred fifty-four million, nine hundred eighty-nine thousand, three hundred forty-five".