775632861480 has 256 divisors, whose sum is σ = 2525565173760. Its totient is φ = 189817344000.

The previous prime is 775632861461. The next prime is 775632861481. The reversal of 775632861480 is 84168236577.

It is a self number, because there is not a number n which added to its sum of digits gives 775632861480.

It is not an unprimeable number, because it can be changed into a prime (775632861481) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25968555 + ... + 25998405.

It is an arithmetic number, because the mean of its divisors is an integer number (9865488960).

Almost surely, 2^775632861480 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 775632861480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1262782586880).

775632861480 is an abundant number, since it is smaller than the sum of its proper divisors (1749932312280).

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

775632861480 is a wasteful number, since it uses less digits than its factorization.

775632861480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30200 (or 30196 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 57.

The spelling of 775632861480 in words is "seven hundred seventy-five billion, six hundred thirty-two million, eight hundred sixty-one thousand, four hundred eighty".