162516215689 has 3 divisors (see below), whose sum is σ = 162516618823. Its totient is φ = 162515812556.

The previous prime is 162516215671. The next prime is 162516215723. The reversal of 162516215689 is 986512615261.

The square root of 162516215689 is 403133.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 986512615261 = 79 ⋅12487501459.

It can be written as a sum of positive squares in only one way, i.e., 81798860025 + 80717355664 = 286005^2 + 284108^2 .

It is not a de Polignac number, because 162516215689 - 2⁵ = 162516215657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162516215629) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 201567 + ... + 604699.

Almost surely, 2^162516215689 is an apocalyptic number.

162516215689 is the 403133-rd square number.

162516215689 is the 201567-th centered octagonal number.

It is an amenable number.

162516215689 is a deficient number, since it is larger than the sum of its proper divisors (403134).

162516215689 is an frugal number, since it uses more digits than its factorization.

162516215689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806266 (or 403133 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 52.

The spelling of 162516215689 in words is "one hundred sixty-two billion, five hundred sixteen million, two hundred fifteen thousand, six hundred eighty-nine".