54738671821 has 2 divisors, whose sum is σ = 54738671822. Its totient is φ = 54738671820.

The previous prime is 54738671809. The next prime is 54738671833. The reversal of 54738671821 is 12817683745.

It is a balanced prime because it is at equal distance from previous prime (54738671809) and next prime (54738671833).

It can be written as a sum of positive squares in only one way, i.e., 54254055625 + 484616196 = 232925^2 + 22014^2 .

It is a cyclic number.

It is not a de Polignac number, because 54738671821 - 2¹⁹ = 54738147533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54738671881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27369335910 + 27369335911.

It is an arithmetic number, because the mean of its divisors is an integer number (27369335911).

Almost surely, 2^54738671821 is an apocalyptic number.

It is an amenable number.

54738671821 is a deficient number, since it is larger than the sum of its proper divisors (1).

54738671821 is an equidigital number, since it uses as much as digits as its factorization.

54738671821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2257920, while the sum is 52.

The spelling of 54738671821 in words is "fifty-four billion, seven hundred thirty-eight million, six hundred seventy-one thousand, eight hundred twenty-one".