7145489961 has 27 divisors (see below), whose sum is σ = 10900428669. Its totient is φ = 4509897912.

The previous prime is 7145489917. The next prime is 7145489969. The reversal of 7145489961 is 1699845417.

The square root of 7145489961 is 84531.

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

7145489961 is a `hidden beast` number, since 7 + 1 + 4 + 548 + 9 + 96 + 1 = 666.

It is not a de Polignac number, because 7145489961 - 2¹⁹ = 7144965673 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7145489898 and 7145489907.

It is not an unprimeable number, because it can be changed into a prime (7145489969) by changing a digit.

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 26 ways as a sum of consecutive naturals, for example, 4817526 + ... + 4819008.

Almost surely, 2^7145489961 is an apocalyptic number.

7145489961 is the 84531-st square number.

7145489961 is the 42266-th centered octagonal number.

It is an amenable number.

7145489961 is a deficient number, since it is larger than the sum of its proper divisors (3754938708).

7145489961 is an equidigital number, since it uses as much as digits as its factorization.

7145489961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3010 (or 1505 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The cubic root of 7145489961 is about 1926.0933765865.

The spelling of 7145489961 in words is "seven billion, one hundred forty-five million, four hundred eighty-nine thousand, nine hundred sixty-one".