776949822464 has 88 divisors (see below), whose sum is σ = 1564176369888. Its totient is φ = 385719459840.

The previous prime is 776949822457. The next prime is 776949822521. The reversal of 776949822464 is 464228949677.

It is a super-2 number, since 2×776949822464² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 776949822394 and 776949822403.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 271564394 + ... + 271567254.

It is an arithmetic number, because the mean of its divisors is an integer number (17774731476).

Almost surely, 2^776949822464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 776949822464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (782088184944).

776949822464 is an abundant number, since it is smaller than the sum of its proper divisors (787226547424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

776949822464 is a wasteful number, since it uses less digits than its factorization.

776949822464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4671 (or 4653 counting only the distinct ones).

The product of its digits is 292626432, while the sum is 68.

The spelling of 776949822464 in words is "seven hundred seventy-six billion, nine hundred forty-nine million, eight hundred twenty-two thousand, four hundred sixty-four".