775245385464 has 128 divisors (see below), whose sum is σ = 2151818956800. Its totient is φ = 230760915840.

The previous prime is 775245385451. The next prime is 775245385477. The reversal of 775245385464 is 464583542577.

It is an interprime number because it is at equal distance from previous prime (775245385451) and next prime (775245385477).

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 775245385398 and 775245385407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20650599 + ... + 20688105.

It is an arithmetic number, because the mean of its divisors is an integer number (16811085600).

Almost surely, 2^775245385464 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 775245385464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1075909478400).

775245385464 is an abundant number, since it is smaller than the sum of its proper divisors (1376573571336).

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

775245385464 is a wasteful number, since it uses less digits than its factorization.

775245385464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38913 (or 38909 counting only the distinct ones).

The product of its digits is 112896000, while the sum is 60.

The spelling of 775245385464 in words is "seven hundred seventy-five billion, two hundred forty-five million, three hundred eighty-five thousand, four hundred sixty-four".