2778340631 has 8 divisors (see below), whose sum is σ = 3031536000. Its totient is φ = 2525248440.

The previous prime is 2778340627. The next prime is 2778340661. The reversal of 2778340631 is 1360438772.

2778340631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2778340631 - 2² = 2778340627 is a prime.

It is a super-2 number, since 2×2778340631² = 15438353323730956322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778340661) 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, 37220 + ... + 83318.

It is an arithmetic number, because the mean of its divisors is an integer number (378942000).

Almost surely, 2^2778340631 is an apocalyptic number.

2778340631 is a deficient number, since it is larger than the sum of its proper divisors (253195369).

2778340631 is a wasteful number, since it uses less digits than its factorization.

2778340631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51589.

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 2778340631 is about 52709.9670935204. The cubic root of 2778340631 is about 1405.8160481828.

The spelling of 2778340631 in words is "two billion, seven hundred seventy-eight million, three hundred forty thousand, six hundred thirty-one".