778413600242 has 4 divisors (see below), whose sum is σ = 1167620400366. Its totient is φ = 389206800120.

The previous prime is 778413600227. The next prime is 778413600277. The reversal of 778413600242 is 242006314877.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 519738623041 + 258674977201 = 720929^2 + 508601^2 .

It is a junction number, because it is equal to n+sod(n) for n = 778413600193 and 778413600202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194603400059 + ... + 194603400062.

Almost surely, 2^778413600242 is an apocalyptic number.

778413600242 is a deficient number, since it is larger than the sum of its proper divisors (389206800124).

778413600242 is a wasteful number, since it uses less digits than its factorization.

778413600242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389206800123.

The product of its (nonzero) digits is 451584, while the sum is 44.

The spelling of 778413600242 in words is "seven hundred seventy-eight billion, four hundred thirteen million, six hundred thousand, two hundred forty-two".