2779250312661 has 8 divisors (see below), whose sum is σ = 3706308336480. Its totient is φ = 1852512915312.

The previous prime is 2779250312623. The next prime is 2779250312723. The reversal of 2779250312661 is 1662130529772.

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

It is not a de Polignac number, because 2779250312661 - 2⁷ = 2779250312533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2779250312611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80136390 + ... + 80171063.

It is an arithmetic number, because the mean of its divisors is an integer number (463288542060).

Almost surely, 2^{2779250312661} is an apocalyptic number.

It is an amenable number.

2779250312661 is a deficient number, since it is larger than the sum of its proper divisors (927058023819).

2779250312661 is a wasteful number, since it uses less digits than its factorization.

2779250312661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160313235.

The product of its (nonzero) digits is 1905120, while the sum is 51.

The spelling of 2779250312661 in words is "two trillion, seven hundred seventy-nine billion, two hundred fifty million, three hundred twelve thousand, six hundred sixty-one".