1055785075778 has 4 divisors (see below), whose sum is σ = 1583677613670. Its totient is φ = 527892537888.

The previous prime is 1055785075757. The next prime is 1055785075789. The reversal of 1055785075778 is 8775705875501.

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., 998394644809 + 57390430969 = 999197^2 + 239563^2 .

It is a super-2 number, since 2×1055785075778² (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, 263946268943 + ... + 263946268946.

Almost surely, 2^{1055785075778} is an apocalyptic number.

1055785075778 is a deficient number, since it is larger than the sum of its proper divisors (527892537892).

1055785075778 is an equidigital number, since it uses as much as digits as its factorization.

1055785075778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527892537891.

The product of its (nonzero) digits is 96040000, while the sum is 65.

The spelling of 1055785075778 in words is "one trillion, fifty-five billion, seven hundred eighty-five million, seventy-five thousand, seven hundred seventy-eight".