775421064 has 96 divisors (see below), whose sum is σ = 2344399200. Its totient is φ = 229501440.

The previous prime is 775421063. The next prime is 775421123. The reversal of 775421064 is 460124577.

775421064 is a `hidden beast` number, since 7 + 7 + 542 + 106 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (775421063) 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 23 ways as a sum of consecutive naturals, for example, 22672 + ... + 45440.

It is an arithmetic number, because the mean of its divisors is an integer number (24420825).

Almost surely, 2^775421064 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 775421064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1172199600).

775421064 is an abundant number, since it is smaller than the sum of its proper divisors (1568978136).

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

775421064 is a wasteful number, since it uses less digits than its factorization.

775421064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22835 (or 22828 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 775421064 is about 27846.3833199215. The cubic root of 775421064 is about 918.7115960068.

It can be divided in two parts, 77542 and 1064, that added together give a triangular number (78606 = T₃₉₆).

The spelling of 775421064 in words is "seven hundred seventy-five million, four hundred twenty-one thousand, sixty-four".