1057664642 has 8 divisors (see below), whose sum is σ = 1588207500. Its totient is φ = 528262144.

The previous prime is 1057664617. The next prime is 1057664651. The reversal of 1057664642 is 2464667501.

It is a happy number.

1057664642 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 2 ways, for example, as 605209201 + 452455441 = 24601^2 + 21271^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1057664642² = 2237308989873976328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1057664642.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282767 + ... + 286482.

Almost surely, 2^1057664642 is an apocalyptic number.

1057664642 is a deficient number, since it is larger than the sum of its proper divisors (530542858).

1057664642 is an equidigital number, since it uses as much as digits as its factorization.

1057664642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570180.

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 1057664642 is about 32521.7564408812. The cubic root of 1057664642 is about 1018.8634790875.

The spelling of 1057664642 in words is "one billion, fifty-seven million, six hundred sixty-four thousand, six hundred forty-two".