7649406605 has 4 divisors (see below), whose sum is σ = 9179287932. Its totient is φ = 6119525280.

The previous prime is 7649406511. The next prime is 7649406617. The reversal of 7649406605 is 5066049467.

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 1955496841 + 5693909764 = 44221^2 + 75458^2 .

It is not a de Polignac number, because 7649406605 - 2²² = 7645212301 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7649406605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 764940656 + ... + 764940665.

It is an arithmetic number, because the mean of its divisors is an integer number (2294821983).

Almost surely, 2^7649406605 is an apocalyptic number.

It is an amenable number.

7649406605 is a deficient number, since it is larger than the sum of its proper divisors (1529881327).

7649406605 is a wasteful number, since it uses less digits than its factorization.

7649406605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529881326.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The square root of 7649406605 is about 87460.8861434642. The cubic root of 7649406605 is about 1970.3463883676.

The spelling of 7649406605 in words is "seven billion, six hundred forty-nine million, four hundred six thousand, six hundred five".