54387678377 has 2 divisors, whose sum is σ = 54387678378. Its totient is φ = 54387678376.

The previous prime is 54387678329. The next prime is 54387678421. The reversal of 54387678377 is 77387678345.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32415841936 + 21971836441 = 180044^2 + 148229^2 .

It is a cyclic number.

It is not a de Polignac number, because 54387678377 - 2²⁴ = 54370901161 is a prime.

It is not a weakly prime, because it can be changed into another prime (54387678677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27193839188 + 27193839189.

It is an arithmetic number, because the mean of its divisors is an integer number (27193839189).

Almost surely, 2^54387678377 is an apocalyptic number.

It is an amenable number.

54387678377 is a deficient number, since it is larger than the sum of its proper divisors (1).

54387678377 is an equidigital number, since it uses as much as digits as its factorization.

54387678377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165957120, while the sum is 65.

The spelling of 54387678377 in words is "fifty-four billion, three hundred eighty-seven million, six hundred seventy-eight thousand, three hundred seventy-seven".