162551005861 has 2 divisors, whose sum is σ = 162551005862. Its totient is φ = 162551005860.

The previous prime is 162551005849. The next prime is 162551005879. The reversal of 162551005861 is 168500155261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158249613636 + 4301392225 = 397806^2 + 65585^2 .

It is a cyclic number.

It is not a de Polignac number, because 162551005861 - 2⁵ = 162551005829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162551005801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81275502930 + 81275502931.

It is an arithmetic number, because the mean of its divisors is an integer number (81275502931).

Almost surely, 2^162551005861 is an apocalyptic number.

It is an amenable number.

162551005861 is a deficient number, since it is larger than the sum of its proper divisors (1).

162551005861 is an equidigital number, since it uses as much as digits as its factorization.

162551005861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72000, while the sum is 40.

The spelling of 162551005861 in words is "one hundred sixty-two billion, five hundred fifty-one million, five thousand, eight hundred sixty-one".