1057640569 has 8 divisors (see below), whose sum is σ = 1063110920. Its totient is φ = 1052182656.

The previous prime is 1057640557. The next prime is 1057640587. The reversal of 1057640569 is 9650467501.

1057640569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 603439225 + 454201344 = 24565^2 + 21312^2 .

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 1057640569 - 2¹¹ = 1057638521 is a prime.

It is a super-2 number, since 2×1057640569² = 2237207146389287522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1057640539) 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, 200437 + ... + 205645.

It is an arithmetic number, because the mean of its divisors is an integer number (132888865).

Almost surely, 2^1057640569 is an apocalyptic number.

It is an amenable number.

1057640569 is a deficient number, since it is larger than the sum of its proper divisors (5470351).

1057640569 is an equidigital number, since it uses as much as digits as its factorization.

1057640569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6219.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 1057640569 is about 32521.3863326888. The cubic root of 1057640569 is about 1018.8557490738.

The spelling of 1057640569 in words is "one billion, fifty-seven million, six hundred forty thousand, five hundred sixty-nine".