1055642240266 has 4 divisors (see below), whose sum is σ = 1583463360402. Its totient is φ = 527821120132.

The previous prime is 1055642240243. The next prime is 1055642240287. The reversal of 1055642240266 is 6620422465501.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 859987296025 + 195654944241 = 927355^2 + 442329^2 .

It is a super-2 number, since 2×1055642240266² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 263910560065 + ... + 263910560068.

Almost surely, 2^{1055642240266} is an apocalyptic number.

1055642240266 is a deficient number, since it is larger than the sum of its proper divisors (527821120136).

1055642240266 is an equidigital number, since it uses as much as digits as its factorization.

1055642240266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527821120135.

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 1055642240266 in words is "one trillion, fifty-five billion, six hundred forty-two million, two hundred forty thousand, two hundred sixty-six".