87311671616645 has 16 divisors (see below), whose sum is σ = 120238574700288. Its totient is φ = 59622433724160.

The previous prime is 87311671616563. The next prime is 87311671616647. The reversal of 87311671616645 is 54661617611378.

It is not a de Polignac number, because 87311671616645 - 2¹⁴ = 87311671600261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87311671616647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5175550049 + ... + 5175566918.

It is an arithmetic number, because the mean of its divisors is an integer number (7514910918768).

Almost surely, 2^{87311671616645} is an apocalyptic number.

It is an amenable number.

87311671616645 is a deficient number, since it is larger than the sum of its proper divisors (32926903083643).

87311671616645 is a wasteful number, since it uses less digits than its factorization.

87311671616645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10351117220.

The product of its digits is 30481920, while the sum is 62.

The spelling of 87311671616645 in words is "eighty-seven trillion, three hundred eleven billion, six hundred seventy-one million, six hundred sixteen thousand, six hundred forty-five".