165571106450 has 24 divisors (see below), whose sum is σ = 326077686612. Its totient is φ = 62332651520.

The previous prime is 165571106447. The next prime is 165571106461. The reversal of 165571106450 is 54601175561.

It can be written as a sum of positive squares in 6 ways, for example, as 45072563809 + 120498542641 = 212303^2 + 347129^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 165571106398 and 165571106407.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97393919 + ... + 97395618.

Almost surely, 2^165571106450 is an apocalyptic number.

165571106450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165571106450 is a deficient number, since it is larger than the sum of its proper divisors (160506580162).

165571106450 is a wasteful number, since it uses less digits than its factorization.

165571106450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194789566 (or 194789561 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 41.

The spelling of 165571106450 in words is "one hundred sixty-five billion, five hundred seventy-one million, one hundred six thousand, four hundred fifty".