2978558368687 has 8 divisors (see below), whose sum is σ = 3390611898240. Its totient is φ = 2590050755160.

The previous prime is 2978558368661. The next prime is 2978558368699. The reversal of 2978558368687 is 7868638558792.

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

It is not a de Polignac number, because 2978558368687 - 2³¹ = 2976410885039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2978558368687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978558368187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5886478737 + ... + 5886479242.

It is an arithmetic number, because the mean of its divisors is an integer number (423826487280).

Almost surely, 2^{2978558368687} is an apocalyptic number.

2978558368687 is a deficient number, since it is larger than the sum of its proper divisors (412053529553).

2978558368687 is a wasteful number, since it uses less digits than its factorization.

2978558368687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11772958013.

The product of its digits is 9754214400, while the sum is 82.

The spelling of 2978558368687 in words is "two trillion, nine hundred seventy-eight billion, five hundred fifty-eight million, three hundred sixty-eight thousand, six hundred eighty-seven".