162605551 has 4 divisors (see below), whose sum is σ = 162676504. Its totient is φ = 162534600.

The previous prime is 162605539. The next prime is 162605557. The reversal of 162605551 is 155506261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155506261 = 31 ⋅5016331.

It is a cyclic number.

It is not a de Polignac number, because 162605551 - 2¹³ = 162597359 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 (162605557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31920 + ... + 36661.

It is an arithmetic number, because the mean of its divisors is an integer number (40669126).

Almost surely, 2^162605551 is an apocalyptic number.

162605551 is a deficient number, since it is larger than the sum of its proper divisors (70953).

162605551 is an equidigital number, since it uses as much as digits as its factorization.

162605551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70952.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 162605551 is about 12751.6881627493. The cubic root of 162605551 is about 545.8145673533.

The spelling of 162605551 in words is "one hundred sixty-two million, six hundred five thousand, five hundred fifty-one".