778471481587 has 24 divisors (see below), whose sum is σ = 837167159936. Its totient is φ = 722932992000.

The previous prime is 778471481551. The next prime is 778471481651. The reversal of 778471481587 is 785184174877.

It is a de Polignac number, because none of the positive numbers 2^k-778471481587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (778471481507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3056323 + ... + 3301219.

Almost surely, 2^778471481587 is an apocalyptic number.

778471481587 is a deficient number, since it is larger than the sum of its proper divisors (58695678349).

778471481587 is a wasteful number, since it uses less digits than its factorization.

778471481587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245071 (or 245030 counting only the distinct ones).

The product of its digits is 98344960, while the sum is 67.

The spelling of 778471481587 in words is "seven hundred seventy-eight billion, four hundred seventy-one million, four hundred eighty-one thousand, five hundred eighty-seven".