2778558351 has 4 divisors (see below), whose sum is σ = 3704744472. Its totient is φ = 1852372232.

The previous prime is 2778558317. The next prime is 2778558359. The reversal of 2778558351 is 1538558772.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2778558351 - 2¹⁴ = 2778541967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2778558294 and 2778558303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778558359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463093056 + ... + 463093061.

It is an arithmetic number, because the mean of its divisors is an integer number (926186118).

Almost surely, 2^2778558351 is an apocalyptic number.

2778558351 is a deficient number, since it is larger than the sum of its proper divisors (926186121).

2778558351 is an equidigital number, since it uses as much as digits as its factorization.

2778558351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926186120.

The product of its digits is 2352000, while the sum is 51.

The square root of 2778558351 is about 52712.0323171095. The cubic root of 2778558351 is about 1405.8527686953.

The spelling of 2778558351 in words is "two billion, seven hundred seventy-eight million, five hundred fifty-eight thousand, three hundred fifty-one".