162578641 has 2 divisors, whose sum is σ = 162578642. Its totient is φ = 162578640.

The previous prime is 162578639. The next prime is 162578707. The reversal of 162578641 is 146875261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158256400 + 4322241 = 12580^2 + 2079^2 .

It is a cyclic number.

It is not a de Polignac number, because 162578641 - 2¹ = 162578639 is a prime.

Together with 162578639, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 162578594 and 162578603.

It is not a weakly prime, because it can be changed into another prime (162578441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81289320 + 81289321.

It is an arithmetic number, because the mean of its divisors is an integer number (81289321).

Almost surely, 2^162578641 is an apocalyptic number.

162578641 is the 6816-th centered heptagonal number.

It is an amenable number.

162578641 is a deficient number, since it is larger than the sum of its proper divisors (1).

162578641 is an equidigital number, since it uses as much as digits as its factorization.

162578641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 40.

The square root of 162578641 is about 12750.6329646806. The cubic root of 162578641 is about 545.7844562855.

The spelling of 162578641 in words is "one hundred sixty-two million, five hundred seventy-eight thousand, six hundred forty-one".