1061775557 has 2 divisors, whose sum is σ = 1061775558. Its totient is φ = 1061775556.

The previous prime is 1061775523. The next prime is 1061775571. The reversal of 1061775557 is 7555771601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 897961156 + 163814401 = 29966^2 + 12799^2 .

It is a cyclic number.

It is not a de Polignac number, because 1061775557 - 2⁶ = 1061775493 is a prime.

It is a super-2 number, since 2×1061775557² = 2254734666885320498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1061775257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530887778 + 530887779.

It is an arithmetic number, because the mean of its divisors is an integer number (530887779).

Almost surely, 2^1061775557 is an apocalyptic number.

It is an amenable number.

1061775557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1061775557 is an equidigital number, since it uses as much as digits as its factorization.

1061775557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 257250, while the sum is 44.

The square root of 1061775557 is about 32584.8976828223. The cubic root of 1061775557 is about 1020.1818069491.

The spelling of 1061775557 in words is "one billion, sixty-one million, seven hundred seventy-five thousand, five hundred fifty-seven".