2779299664687 has 16 divisors (see below), whose sum is σ = 3421298728960. Its totient is φ = 2198606330592.

The previous prime is 2779299664679. The next prime is 2779299664709. The reversal of 2779299664687 is 7864669929772.

It is not a de Polignac number, because 2779299664687 - 2³ = 2779299664679 is a prime.

It is a super-2 number, since 2×2779299664687² (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 2779299664687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2779299664607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2274237 + ... + 3275782.

It is an arithmetic number, because the mean of its divisors is an integer number (213831170560).

Almost surely, 2^{2779299664687} is an apocalyptic number.

2779299664687 is a deficient number, since it is larger than the sum of its proper divisors (641999064273).

2779299664687 is a wasteful number, since it uses less digits than its factorization.

2779299664687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555542.

The product of its digits is 6913299456, while the sum is 82.

The spelling of 2779299664687 in words is "two trillion, seven hundred seventy-nine billion, two hundred ninety-nine million, six hundred sixty-four thousand, six hundred eighty-seven".