57650661509 has 4 divisors (see below), whose sum is σ = 65886470304. Its totient is φ = 49414852716.

The previous prime is 57650661487. The next prime is 57650661547. The reversal of 57650661509 is 90516605675.

57650661509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57650661509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57650661589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4117904387 + ... + 4117904400.

It is an arithmetic number, because the mean of its divisors is an integer number (16471617576).

Almost surely, 2^57650661509 is an apocalyptic number.

It is an amenable number.

57650661509 is a deficient number, since it is larger than the sum of its proper divisors (8235808795).

57650661509 is an equidigital number, since it uses as much as digits as its factorization.

57650661509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8235808794.

The product of its (nonzero) digits is 1701000, while the sum is 50.

The spelling of 57650661509 in words is "fifty-seven billion, six hundred fifty million, six hundred sixty-one thousand, five hundred nine".