1461544745 has 4 divisors (see below), whose sum is σ = 1753853700. Its totient is φ = 1169235792.

The previous prime is 1461544709. The next prime is 1461544823. The reversal of 1461544745 is 5474451641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5474451641 = 24851 ⋅220291.

It can be written as a sum of positive squares in 2 ways, for example, as 922701376 + 538843369 = 30376^2 + 23213^2 .

It is a cyclic number.

It is not a de Polignac number, because 1461544745 - 2⁶ = 1461544681 is a prime.

It is a super-2 number, since 2×1461544745² = 4272226083274230050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146154470 + ... + 146154479.

It is an arithmetic number, because the mean of its divisors is an integer number (438463425).

Almost surely, 2^1461544745 is an apocalyptic number.

It is an amenable number.

1461544745 is a deficient number, since it is larger than the sum of its proper divisors (292308955).

1461544745 is an equidigital number, since it uses as much as digits as its factorization.

1461544745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292308954.

The product of its digits is 268800, while the sum is 41.

The square root of 1461544745 is about 38230.1549172901. The cubic root of 1461544745 is about 1134.8471515596.

The spelling of 1461544745 in words is "one billion, four hundred sixty-one million, five hundred forty-four thousand, seven hundred forty-five".