7328897561 has 4 divisors (see below), whose sum is σ = 7429293492. Its totient is φ = 7228501632.

The previous prime is 7328897533. The next prime is 7328897567. The reversal of 7328897561 is 1657988237.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4727387536 + 2601510025 = 68756^2 + 51005^2 .

It is a cyclic number.

It is not a de Polignac number, because 7328897561 - 2¹⁴ = 7328881177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7328897497 and 7328897506.

It is not an unprimeable number, because it can be changed into a prime (7328897567) 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, 50197856 + ... + 50198001.

It is an arithmetic number, because the mean of its divisors is an integer number (1857323373).

Almost surely, 2^7328897561 is an apocalyptic number.

It is an amenable number.

7328897561 is a deficient number, since it is larger than the sum of its proper divisors (100395931).

7328897561 is a wasteful number, since it uses less digits than its factorization.

7328897561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100395930.

The product of its digits is 5080320, while the sum is 56.

The square root of 7328897561 is about 85608.9806095132. The cubic root of 7328897561 is about 1942.4337578995.

The spelling of 7328897561 in words is "seven billion, three hundred twenty-eight million, eight hundred ninety-seven thousand, five hundred sixty-one".