1077728385773 has 4 divisors (see below), whose sum is σ = 1160630569308. Its totient is φ = 994826202240.

The previous prime is 1077728385763. The next prime is 1077728385791. The reversal of 1077728385773 is 3775838277701.

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

It can be written as a sum of positive squares in 2 ways, for example, as 303571246729 + 774157139044 = 550973^2 + 879862^2 .

It is not a de Polignac number, because 1077728385773 - 2⁶ = 1077728385709 is a prime.

It is a super-2 number, since 2×1077728385773² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1077728385703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41451091748 + ... + 41451091773.

It is an arithmetic number, because the mean of its divisors is an integer number (290157642327).

Almost surely, 2^{1077728385773} is an apocalyptic number.

1077728385773 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1077728385773 is a deficient number, since it is larger than the sum of its proper divisors (82902183535).

1077728385773 is an equidigital number, since it uses as much as digits as its factorization.

1077728385773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82902183534.

The product of its (nonzero) digits is 96808320, while the sum is 65.

The spelling of 1077728385773 in words is "one trillion, seventy-seven billion, seven hundred twenty-eight million, three hundred eighty-five thousand, seven hundred seventy-three".