7409938561 has 9 divisors (see below), whose sum is σ = 7542829281. Its totient is φ = 7279353684.

The previous prime is 7409938537. The next prime is 7409938603. The reversal of 7409938561 is 1658399047.

It is a happy number.

The square root of 7409938561 is 86081.

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

It is not a de Polignac number, because 7409938561 - 2⁷ = 7409938433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7409938499 and 7409938508.

It is not an unprimeable number, because it can be changed into a prime (7409938661) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5078050 + ... + 5079508.

Almost surely, 2^7409938561 is an apocalyptic number.

7409938561 is the 86081-st square number.

7409938561 is the 43041-st centered octagonal number.

It is an amenable number.

7409938561 is a deficient number, since it is larger than the sum of its proper divisors (132890720).

7409938561 is an frugal number, since it uses more digits than its factorization.

7409938561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3036 (or 1518 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 52.

The cubic root of 7409938561 is about 1949.5671676634.

The spelling of 7409938561 in words is "seven billion, four hundred nine million, nine hundred thirty-eight thousand, five hundred sixty-one".