55778027 has 2 divisors, whose sum is σ = 55778028. Its totient is φ = 55778026.

The previous prime is 55777993. The next prime is 55778087. The reversal of 55778027 is 72087755.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55778027 - 2⁶ = 55777963 is a prime.

It is a super-2 number, since 2×55778027² = 6222376592025458, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55778087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27889013 + 27889014.

It is an arithmetic number, because the mean of its divisors is an integer number (27889014).

Almost surely, 2^55778027 is an apocalyptic number.

55778027 is a deficient number, since it is larger than the sum of its proper divisors (1).

55778027 is an equidigital number, since it uses as much as digits as its factorization.

55778027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 137200, while the sum is 41.

The square root of 55778027 is about 7468.4688524489. The cubic root of 55778027 is about 382.0800682834.

The spelling of 55778027 in words is "fifty-five million, seven hundred seventy-eight thousand, twenty-seven".