2778018603578 has 16 divisors (see below), whose sum is σ = 4412190714624. Its totient is φ = 1307289977280.

The previous prime is 2778018603551. The next prime is 2778018603641. The reversal of 2778018603578 is 8753068108772.

It is a super-2 number, since 2×2778018603578² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2778018603578.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3700151 + ... + 4387157.

It is an arithmetic number, because the mean of its divisors is an integer number (275761919664).

Almost surely, 2^{2778018603578} is an apocalyptic number.

2778018603578 is a deficient number, since it is larger than the sum of its proper divisors (1634172111046).

2778018603578 is a wasteful number, since it uses less digits than its factorization.

2778018603578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805957.

The product of its (nonzero) digits is 31610880, while the sum is 62.

The spelling of 2778018603578 in words is "two trillion, seven hundred seventy-eight billion, eighteen million, six hundred three thousand, five hundred seventy-eight".