277064464385 has 4 divisors (see below), whose sum is σ = 332477357268. Its totient is φ = 221651571504.

The previous prime is 277064464367. The next prime is 277064464387. The reversal of 277064464385 is 583464460772.

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 2 ways, for example, as 165968241664 + 111096222721 = 407392^2 + 333311^2 .

It is a cyclic number.

It is not a de Polignac number, because 277064464385 - 2⁶ = 277064464321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 277064464385.

It is not an unprimeable number, because it can be changed into a prime (277064464387) 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, 27706446434 + ... + 27706446443.

It is an arithmetic number, because the mean of its divisors is an integer number (83119339317).

Almost surely, 2^277064464385 is an apocalyptic number.

It is an amenable number.

277064464385 is a deficient number, since it is larger than the sum of its proper divisors (55412892883).

277064464385 is an equidigital number, since it uses as much as digits as its factorization.

277064464385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55412892882.

The product of its (nonzero) digits is 27095040, while the sum is 56.

The spelling of 277064464385 in words is "two hundred seventy-seven billion, sixty-four million, four hundred sixty-four thousand, three hundred eighty-five".