2778856314828 has 36 divisors (see below), whose sum is σ = 7127039202360. Its totient is φ = 842077670720.

The previous prime is 2778856314809. The next prime is 2778856314833. The reversal of 2778856314828 is 8284136588772.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 956904993 + ... + 956907896.

Almost surely, 2^{2778856314828} is an apocalyptic number.

It is an amenable number.

2778856314828 is an abundant number, since it is smaller than the sum of its proper divisors (4348182887532).

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

2778856314828 is a wasteful number, since it uses less digits than its factorization.

2778856314828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913812918 (or 1913812905 counting only the distinct ones).

The product of its digits is 289013760, while the sum is 69.

The spelling of 2778856314828 in words is "two trillion, seven hundred seventy-eight billion, eight hundred fifty-six million, three hundred fourteen thousand, eight hundred twenty-eight".