54785356421 has 2 divisors, whose sum is σ = 54785356422. Its totient is φ = 54785356420.

The previous prime is 54785356397. The next prime is 54785356471. The reversal of 54785356421 is 12465358745.

It is an a-pointer prime, because the next prime (54785356471) can be obtained adding 54785356421 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27925752100 + 26859604321 = 167110^2 + 163889^2 .

It is a cyclic number.

It is not a de Polignac number, because 54785356421 - 2³⁴ = 37605487237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54785356421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54785356471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27392678210 + 27392678211.

It is an arithmetic number, because the mean of its divisors is an integer number (27392678211).

Almost surely, 2^54785356421 is an apocalyptic number.

It is an amenable number.

54785356421 is a deficient number, since it is larger than the sum of its proper divisors (1).

54785356421 is an equidigital number, since it uses as much as digits as its factorization.

54785356421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032000, while the sum is 50.

The spelling of 54785356421 in words is "fifty-four billion, seven hundred eighty-five million, three hundred fifty-six thousand, four hundred twenty-one".