5651990605 has 4 divisors (see below), whose sum is σ = 6782388732. Its totient is φ = 4521592480.

The previous prime is 5651990581. The next prime is 5651990621. The reversal of 5651990605 is 5060991565.

It is a happy number.

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 974251369 + 4677739236 = 31213^2 + 68394^2 .

It is not a de Polignac number, because 5651990605 - 2⁵ = 5651990573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 565199056 + ... + 565199065.

It is an arithmetic number, because the mean of its divisors is an integer number (1695597183).

Almost surely, 2^5651990605 is an apocalyptic number.

It is an amenable number.

5651990605 is a deficient number, since it is larger than the sum of its proper divisors (1130398127).

5651990605 is a wasteful number, since it uses less digits than its factorization.

5651990605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130398126.

The product of its (nonzero) digits is 364500, while the sum is 46.

The square root of 5651990605 is about 75179.7220332717. The cubic root of 5651990605 is about 1781.2866391889.

The spelling of 5651990605 in words is "five billion, six hundred fifty-one million, nine hundred ninety thousand, six hundred five".