2778872141 has 8 divisors (see below), whose sum is σ = 2846674944. Its totient is φ = 2711787120.

The previous prime is 2778872111. The next prime is 2778872149. The reversal of 2778872141 is 1412788772.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2778872141 - 2⁶ = 2778872077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778872149) 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, 171605 + ... + 187098.

It is an arithmetic number, because the mean of its divisors is an integer number (355834368).

Almost surely, 2^2778872141 is an apocalyptic number.

It is an amenable number.

2778872141 is a deficient number, since it is larger than the sum of its proper divisors (67802803).

2778872141 is a wasteful number, since it uses less digits than its factorization.

2778872141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358891.

The product of its digits is 351232, while the sum is 47.

The square root of 2778872141 is about 52715.0086882284. The cubic root of 2778872141 is about 1405.9056889365.

The spelling of 2778872141 in words is "two billion, seven hundred seventy-eight million, eight hundred seventy-two thousand, one hundred forty-one".