778425338536 has 16 divisors (see below), whose sum is σ = 1460746827540. Its totient is φ = 388892851200.

The previous prime is 778425338513. The next prime is 778425338557. The reversal of 778425338536 is 635833524877.

It can be written as a sum of positive squares in 2 ways, for example, as 774030444100 + 4394894436 = 879790^2 + 66294^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39966915 + ... + 39986386.

Almost surely, 2^778425338536 is an apocalyptic number.

It is an amenable number.

778425338536 is a deficient number, since it is larger than the sum of its proper divisors (682321489004).

778425338536 is a wasteful number, since it uses less digits than its factorization.

778425338536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79954524 (or 79954520 counting only the distinct ones).

The product of its digits is 101606400, while the sum is 61.

The spelling of 778425338536 in words is "seven hundred seventy-eight billion, four hundred twenty-five million, three hundred thirty-eight thousand, five hundred thirty-six".