87541717505 has 16 divisors (see below), whose sum is σ = 117697368384. Its totient is φ = 61945980480.

The previous prime is 87541717469. The next prime is 87541717511. The reversal of 87541717505 is 50571714578.

It is not a de Polignac number, because 87541717505 - 2¹⁶ = 87541651969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21506987 + ... + 21511056.

It is an arithmetic number, because the mean of its divisors is an integer number (7356085524).

Almost surely, 2^87541717505 is an apocalyptic number.

It is an amenable number.

87541717505 is a deficient number, since it is larger than the sum of its proper divisors (30155650879).

87541717505 is a wasteful number, since it uses less digits than its factorization.

87541717505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43018096.

The product of its (nonzero) digits is 1372000, while the sum is 50.

The spelling of 87541717505 in words is "eighty-seven billion, five hundred forty-one million, seven hundred seventeen thousand, five hundred five".