776734966560 has 192 divisors, whose sum is σ = 2800770739200. Its totient is φ = 177252129792.

The previous prime is 776734966559. The next prime is 776734966561. The reversal of 776734966560 is 65669437677.

It is an interprime number because it is at equal distance from previous prime (776734966559) and next prime (776734966561).

It is a junction number, because it is equal to n+sod(n) for n = 776734966491 and 776734966500.

It is not an unprimeable number, because it can be changed into a prime (776734966561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1893111 + ... + 2266569.

It is an arithmetic number, because the mean of its divisors is an integer number (14587347600).

Almost surely, 2^776734966560 is an apocalyptic number.

776734966560 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 776734966560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1400385369600).

776734966560 is an abundant number, since it is smaller than the sum of its proper divisors (2024035772640).

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

776734966560 is a wasteful number, since it uses less digits than its factorization.

776734966560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374103 (or 374095 counting only the distinct ones).

The product of its (nonzero) digits is 240045120, while the sum is 66.

The spelling of 776734966560 in words is "seven hundred seventy-six billion, seven hundred thirty-four million, nine hundred sixty-six thousand, five hundred sixty".