1772348561 has 4 divisors (see below), whose sum is σ = 1782140724. Its totient is φ = 1762556400.

The previous prime is 1772348527. The next prime is 1772348573. The reversal of 1772348561 is 1658432771.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1658432771 = 11287 ⋅146933.

It can be written as a sum of positive squares in 2 ways, for example, as 68227600 + 1704120961 = 8260^2 + 41281^2 .

It is a cyclic number.

It is not a de Polignac number, because 1772348561 - 2¹⁰ = 1772347537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1772348261) 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, 4895810 + ... + 4896171.

It is an arithmetic number, because the mean of its divisors is an integer number (445535181).

Almost surely, 2^1772348561 is an apocalyptic number.

It is an amenable number.

1772348561 is a deficient number, since it is larger than the sum of its proper divisors (9792163).

1772348561 is an equidigital number, since it uses as much as digits as its factorization.

1772348561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9792162.

The product of its digits is 282240, while the sum is 44.

The square root of 1772348561 is about 42099.2703143416. The cubic root of 1772348561 is about 1210.1792783561.

The spelling of 1772348561 in words is "one billion, seven hundred seventy-two million, three hundred forty-eight thousand, five hundred sixty-one".