775800648 has 96 divisors (see below), whose sum is σ = 2412221760. Its totient is φ = 220648320.

The previous prime is 775800601. The next prime is 775800667. The reversal of 775800648 is 846008577.

775800648 is a `hidden beast` number, since 7 + 7 + 580 + 0 + 64 + 8 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111018 + ... + 117798.

It is an arithmetic number, because the mean of its divisors is an integer number (25127310).

Almost surely, 2^775800648 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 775800648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1206110880).

775800648 is an abundant number, since it is smaller than the sum of its proper divisors (1636421112).

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

775800648 is a wasteful number, since it uses less digits than its factorization.

775800648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7027 (or 7020 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 775800648 is about 27853.1981646632. The cubic root of 775800648 is about 918.8614807387.

The spelling of 775800648 in words is "seven hundred seventy-five million, eight hundred thousand, six hundred forty-eight".