5642655645 has 32 divisors (see below), whose sum is σ = 9855521280. Its totient is φ = 2734021440.

The previous prime is 5642655631. The next prime is 5642655661. The reversal of 5642655645 is 5465562465.

It is not a de Polignac number, because 5642655645 - 2¹⁰ = 5642654621 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5642655594 and 5642655603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 257946 + ... + 278964.

It is an arithmetic number, because the mean of its divisors is an integer number (307985040).

Almost surely, 2^5642655645 is an apocalyptic number.

5642655645 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5642655645 is a deficient number, since it is larger than the sum of its proper divisors (4212865635).

5642655645 is a wasteful number, since it uses less digits than its factorization.

5642655645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22665.

The product of its digits is 4320000, while the sum is 48.

The square root of 5642655645 is about 75117.6120826534. The cubic root of 5642655645 is about 1780.3054272215.

The spelling of 5642655645 in words is "five billion, six hundred forty-two million, six hundred fifty-five thousand, six hundred forty-five".