1061775555 has 8 divisors (see below), whose sum is σ = 1698840912. Its totient is φ = 566280288.

The previous prime is 1061775523. The next prime is 1061775557. The reversal of 1061775555 is 5555771601.

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 1061775555 - 2⁵ = 1061775523 is a prime.

It is a super-2 number, since 2×1061775555² = 2254734658391116050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1061775557) 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, 35392504 + ... + 35392533.

It is an arithmetic number, because the mean of its divisors is an integer number (212355114).

Almost surely, 2^1061775555 is an apocalyptic number.

1061775555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1061775555 is a deficient number, since it is larger than the sum of its proper divisors (637065357).

1061775555 is an equidigital number, since it uses as much as digits as its factorization.

1061775555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70785045.

The product of its (nonzero) digits is 183750, while the sum is 42.

The square root of 1061775555 is about 32584.8976521333. The cubic root of 1061775555 is about 1020.1818063085.

The spelling of 1061775555 in words is "one billion, sixty-one million, seven hundred seventy-five thousand, five hundred fifty-five".