1068561557 has 8 divisors (see below), whose sum is σ = 1250999232. Its totient is φ = 893570400.

The previous prime is 1068561547. The next prime is 1068561587. The reversal of 1068561557 is 7551658601.

It is a happy number.

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

It is not a de Polignac number, because 1068561557 - 2⁴ = 1068561541 is a prime.

It is a super-2 number, since 2×1068561557² = 2283647602196528498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1068561547) 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, 1861319 + ... + 1861892.

It is an arithmetic number, because the mean of its divisors is an integer number (156374904).

Almost surely, 2^1068561557 is an apocalyptic number.

It is an amenable number.

1068561557 is a deficient number, since it is larger than the sum of its proper divisors (182437675).

1068561557 is an equidigital number, since it uses as much as digits as its factorization.

1068561557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3723259.

The product of its (nonzero) digits is 252000, while the sum is 44.

The square root of 1068561557 is about 32688.8598302235. The cubic root of 1068561557 is about 1022.3505820806.

The spelling of 1068561557 in words is "one billion, sixty-eight million, five hundred sixty-one thousand, five hundred fifty-seven".