54557849657 has 2 divisors, whose sum is σ = 54557849658. Its totient is φ = 54557849656.

The previous prime is 54557849551. The next prime is 54557849663. The reversal of 54557849657 is 75694875545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42731504656 + 11826345001 = 206716^2 + 108749^2 .

It is a cyclic number.

It is not a de Polignac number, because 54557849657 - 2²⁴ = 54541072441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 54557849593 and 54557849602.

It is not a weakly prime, because it can be changed into another prime (54557849257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27278924828 + 27278924829.

It is an arithmetic number, because the mean of its divisors is an integer number (27278924829).

Almost surely, 2^54557849657 is an apocalyptic number.

It is an amenable number.

54557849657 is a deficient number, since it is larger than the sum of its proper divisors (1).

54557849657 is an equidigital number, since it uses as much as digits as its factorization.

54557849657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680000, while the sum is 65.

The spelling of 54557849657 in words is "fifty-four billion, five hundred fifty-seven million, eight hundred forty-nine thousand, six hundred fifty-seven".