87388677865 has 8 divisors (see below), whose sum is σ = 108482496840. Its totient is φ = 67500220032.

The previous prime is 87388677839. The next prime is 87388677869. The reversal of 87388677865 is 56877688378.

It can be written as a sum of positive squares in 4 ways, for example, as 2210504256 + 85178173609 = 47016^2 + 291853^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 87388677865 - 2¹⁹ = 87388153577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87388677869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301340124 + ... + 301340413.

It is an arithmetic number, because the mean of its divisors is an integer number (13560312105).

Almost surely, 2^87388677865 is an apocalyptic number.

It is an amenable number.

87388677865 is a deficient number, since it is larger than the sum of its proper divisors (21093818975).

87388677865 is a wasteful number, since it uses less digits than its factorization.

87388677865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602680571.

The product of its digits is 758661120, while the sum is 73.

The spelling of 87388677865 in words is "eighty-seven billion, three hundred eighty-eight million, six hundred seventy-seven thousand, eight hundred sixty-five".