7409161645 has 8 divisors (see below), whose sum is σ = 9012788856. Its totient is φ = 5846132736.

The previous prime is 7409161631. The next prime is 7409161673. The reversal of 7409161645 is 5461619047.

It can be written as a sum of positive squares in 4 ways, for example, as 157276681 + 7251884964 = 12541^2 + 85158^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7409161645 - 2¹⁵ = 7409128877 is a prime.

It is a super-3 number, since 3×7409161645³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10149172 + ... + 10149901.

It is an arithmetic number, because the mean of its divisors is an integer number (1126598607).

Almost surely, 2^7409161645 is an apocalyptic number.

It is an amenable number.

7409161645 is a deficient number, since it is larger than the sum of its proper divisors (1603627211).

7409161645 is a wasteful number, since it uses less digits than its factorization.

7409161645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20299151.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 7409161645 is about 86076.4871785553. The cubic root of 7409161645 is about 1949.4990293177.

The spelling of 7409161645 in words is "seven billion, four hundred nine million, one hundred sixty-one thousand, six hundred forty-five".