87051621016217 has 16 divisors (see below), whose sum is σ = 102271728601728. Its totient is φ = 73049387969280.

The previous prime is 87051621016159. The next prime is 87051621016219. The reversal of 87051621016217 is 71261012615078.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87051621016217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87051621016219) 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, 7624433 + ... + 15239265.

It is an arithmetic number, because the mean of its divisors is an integer number (6391983037608).

Almost surely, 2^{87051621016217} is an apocalyptic number.

It is an amenable number.

87051621016217 is a deficient number, since it is larger than the sum of its proper divisors (15220107585511).

87051621016217 is a wasteful number, since it uses less digits than its factorization.

87051621016217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7694800.

The product of its (nonzero) digits is 282240, while the sum is 47.

The spelling of 87051621016217 in words is "eighty-seven trillion, fifty-one billion, six hundred twenty-one million, sixteen thousand, two hundred seventeen".