5657198209 has 8 divisors (see below), whose sum is σ = 6148262120. Its totient is φ = 5174119296.

The previous prime is 5657198179. The next prime is 5657198251. The reversal of 5657198209 is 9028917565.

It can be written as a sum of positive squares in 4 ways, for example, as 174240000 + 5482958209 = 13200^2 + 74047^2 .

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 5657198209 - 2²⁵ = 5623643777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5657198269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1994772 + ... + 1997605.

It is an arithmetic number, because the mean of its divisors is an integer number (768532765).

Almost surely, 2^5657198209 is an apocalyptic number.

It is an amenable number.

5657198209 is a deficient number, since it is larger than the sum of its proper divisors (491063911).

5657198209 is a wasteful number, since it uses less digits than its factorization.

5657198209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3992499.

The product of its (nonzero) digits is 1360800, while the sum is 52.

The square root of 5657198209 is about 75214.3484250179. The cubic root of 5657198209 is about 1781.8335490341.

The spelling of 5657198209 in words is "five billion, six hundred fifty-seven million, one hundred ninety-eight thousand, two hundred nine".