1745651961 has 27 divisors (see below), whose sum is σ = 2664827919. Its totient is φ = 1101012912.

The previous prime is 1745651909. The next prime is 1745651981. The reversal of 1745651961 is 1691565471.

The square root of 1745651961 is 41781.

It is a perfect power (a square), and thus also a powerful number.

1745651961 is a `hidden beast` number, since 1 + 7 + 456 + 5 + 196 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1707755625 + 37896336 = 41325^2 + 6156^2 .

It is not a de Polignac number, because 1745651961 - 2⁷ = 1745651833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1745651981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2381151 + ... + 2381883.

Almost surely, 2^1745651961 is an apocalyptic number.

1745651961 is the 41781-st square number.

1745651961 is the 20891-st centered octagonal number.

It is an amenable number.

1745651961 is a deficient number, since it is larger than the sum of its proper divisors (919175958).

1745651961 is an frugal number, since it uses more digits than its factorization.

1745651961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510 (or 755 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The cubic root of 1745651961 is about 1204.0722669856.

The spelling of 1745651961 in words is "one billion, seven hundred forty-five million, six hundred fifty-one thousand, nine hundred sixty-one".