3740257561 has 4 divisors (see below), whose sum is σ = 3740752692. Its totient is φ = 3739762432.

The previous prime is 3740257523. The next prime is 3740257579. The reversal of 3740257561 is 1657520473.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1657520473 = 7 ⋅236788639.

It can be written as a sum of positive squares in 2 ways, for example, as 2280635536 + 1459622025 = 47756^2 + 38205^2 .

It is a cyclic number.

It is not a de Polignac number, because 3740257561 - 2²⁵ = 3706703129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3740251561) 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, 236056 + ... + 251401.

It is an arithmetic number, because the mean of its divisors is an integer number (935188173).

Almost surely, 2^3740257561 is an apocalyptic number.

It is an amenable number.

3740257561 is a deficient number, since it is larger than the sum of its proper divisors (495131).

3740257561 is an equidigital number, since it uses as much as digits as its factorization.

3740257561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495130.

The product of its (nonzero) digits is 176400, while the sum is 40.

The square root of 3740257561 is about 61157.6451557775. The cubic root of 3740257561 is about 1552.2696629121.

The spelling of 3740257561 in words is "three billion, seven hundred forty million, two hundred fifty-seven thousand, five hundred sixty-one".