164216541987 has 12 divisors (see below), whose sum is σ = 237206439600. Its totient is φ = 109475494128.

The previous prime is 164216541943. The next prime is 164216541989. The reversal of 164216541987 is 789145612461.

164216541987 is a `hidden beast` number, since 1 + 6 + 4 + 2 + 1 + 6 + 541 + 98 + 7 = 666.

It is not a de Polignac number, because 164216541987 - 2⁷ = 164216541859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164216541989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 380514 + ... + 687912.

It is an arithmetic number, because the mean of its divisors is an integer number (19767203300).

Almost surely, 2^164216541987 is an apocalyptic number.

164216541987 is a deficient number, since it is larger than the sum of its proper divisors (72989897613).

164216541987 is a wasteful number, since it uses less digits than its factorization.

164216541987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366762 (or 366759 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 164216541987 in words is "one hundred sixty-four billion, two hundred sixteen million, five hundred forty-one thousand, nine hundred eighty-seven".