2778055487 has 2 divisors, whose sum is σ = 2778055488. Its totient is φ = 2778055486.

The previous prime is 2778055471. The next prime is 2778055627. The reversal of 2778055487 is 7845508772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2778055487 - 2⁴ = 2778055471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2778055447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1389027743 + 1389027744.

It is an arithmetic number, because the mean of its divisors is an integer number (1389027744).

Almost surely, 2^2778055487 is an apocalyptic number.

2778055487 is a deficient number, since it is larger than the sum of its proper divisors (1).

2778055487 is an equidigital number, since it uses as much as digits as its factorization.

2778055487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4390400, while the sum is 53.

The square root of 2778055487 is about 52707.2621846364. The cubic root of 2778055487 is about 1405.7679530811.

The spelling of 2778055487 in words is "two billion, seven hundred seventy-eight million, fifty-five thousand, four hundred eighty-seven".