120585457777 has 4 divisors (see below), whose sum is σ = 120587325156. Its totient is φ = 120583590400.

The previous prime is 120585457771. The next prime is 120585457813. The reversal of 120585457777 is 777754585021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 777754585021 = 1303 ⋅596895307.

It can be written as a sum of positive squares in 2 ways, for example, as 32385961521 + 88199496256 = 179961^2 + 296984^2 .

It is a cyclic number.

It is not a de Polignac number, because 120585457777 - 2¹⁹ = 120584933489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120585457771) 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, 833224 + ... + 967177.

It is an arithmetic number, because the mean of its divisors is an integer number (30146831289).

Almost surely, 2^120585457777 is an apocalyptic number.

It is an amenable number.

120585457777 is a deficient number, since it is larger than the sum of its proper divisors (1867379).

120585457777 is an equidigital number, since it uses as much as digits as its factorization.

120585457777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867378.

The product of its (nonzero) digits is 19208000, while the sum is 58.

The spelling of 120585457777 in words is "one hundred twenty billion, five hundred eighty-five million, four hundred fifty-seven thousand, seven hundred seventy-seven".