54778538953 has 2 divisors, whose sum is σ = 54778538954. Its totient is φ = 54778538952.

The previous prime is 54778538863. The next prime is 54778538999. The reversal of 54778538953 is 35983587745.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52538599369 + 2239939584 = 229213^2 + 47328^2 .

It is a cyclic number.

It is not a de Polignac number, because 54778538953 - 2²⁵ = 54744984521 is a prime.

It is not a weakly prime, because it can be changed into another prime (54778538053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27389269476 + 27389269477.

It is an arithmetic number, because the mean of its divisors is an integer number (27389269477).

Almost surely, 2^54778538953 is an apocalyptic number.

It is an amenable number.

54778538953 is a deficient number, since it is larger than the sum of its proper divisors (1).

54778538953 is an equidigital number, since it uses as much as digits as its factorization.

54778538953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008000, while the sum is 64.

The spelling of 54778538953 in words is "fifty-four billion, seven hundred seventy-eight million, five hundred thirty-eight thousand, nine hundred fifty-three".