2772039978685 has 8 divisors (see below), whose sum is σ = 3355885567800. Its totient is φ = 2198006920704.

The previous prime is 2772039978647. The next prime is 2772039978737. The reversal of 2772039978685 is 5868799302772.

It can be written as a sum of positive squares in 4 ways, for example, as 365564135161 + 2406475843524 = 604619^2 + 1551282^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2772039978685 is a prime.

It is a congruent number.

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, 2453132160 + ... + 2453133289.

It is an arithmetic number, because the mean of its divisors is an integer number (419485695975).

Almost surely, 2^{2772039978685} is an apocalyptic number.

It is an amenable number.

2772039978685 is a deficient number, since it is larger than the sum of its proper divisors (583845589115).

2772039978685 is a wasteful number, since it uses less digits than its factorization.

2772039978685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4906265567.

The product of its (nonzero) digits is 640120320, while the sum is 73.

The spelling of 2772039978685 in words is "two trillion, seven hundred seventy-two billion, thirty-nine million, nine hundred seventy-eight thousand, six hundred eighty-five".