776761385345 has 16 divisors (see below), whose sum is σ = 1016916361920. Its totient is φ = 564881208000.

The previous prime is 776761385341. The next prime is 776761385357. The reversal of 776761385345 is 543583167677.

It is a happy number.

It is not a de Polignac number, because 776761385345 - 2² = 776761385341 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (776761385341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 430466 + ... + 1318644.

It is an arithmetic number, because the mean of its divisors is an integer number (63557272620).

Almost surely, 2^776761385345 is an apocalyptic number.

It is an amenable number.

776761385345 is a deficient number, since it is larger than the sum of its proper divisors (240154976575).

776761385345 is a wasteful number, since it uses less digits than its factorization.

776761385345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904096.

The product of its digits is 88905600, while the sum is 62.

The spelling of 776761385345 in words is "seven hundred seventy-six billion, seven hundred sixty-one million, three hundred eighty-five thousand, three hundred forty-five".