1772045641 has 4 divisors (see below), whose sum is σ = 1772216212. Its totient is φ = 1771875072.

The previous prime is 1772045623. The next prime is 1772045683. The reversal of 1772045641 is 1465402771.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 874444041 + 897601600 = 29571^2 + 29960^2 .

It is a cyclic number.

It is not a de Polignac number, because 1772045641 - 2¹¹ = 1772043593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1772045641.

It is not an unprimeable number, because it can be changed into a prime (1772045941) 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, 68616 + ... + 90841.

It is an arithmetic number, because the mean of its divisors is an integer number (443054053).

Almost surely, 2^1772045641 is an apocalyptic number.

It is an amenable number.

1772045641 is a deficient number, since it is larger than the sum of its proper divisors (170571).

1772045641 is a wasteful number, since it uses less digits than its factorization.

1772045641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170570.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 1772045641 is about 42095.6724735453. The cubic root of 1772045641 is about 1210.1103287145.

The spelling of 1772045641 in words is "one billion, seven hundred seventy-two million, forty-five thousand, six hundred forty-one".