771078648 has 16 divisors (see below), whose sum is σ = 1927696680. Its totient is φ = 257026208.

The previous prime is 771078641. The next prime is 771078661. The reversal of 771078648 is 846870177.

It is a junction number, because it is equal to n+sod(n) for n = 771078597 and 771078606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (771078641) 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, 16064115 + ... + 16064162.

Almost surely, 2^771078648 is an apocalyptic number.

It is an amenable number.

771078648 is an abundant number, since it is smaller than the sum of its proper divisors (1156618032).

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

771078648 is a wasteful number, since it uses less digits than its factorization.

771078648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32128286 (or 32128282 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 48.

The square root of 771078648 is about 27768.3029369819. The cubic root of 771078648 is about 916.9934334898.

The spelling of 771078648 in words is "seven hundred seventy-one million, seventy-eight thousand, six hundred forty-eight".