55077643 has 2 divisors, whose sum is σ = 55077644. Its totient is φ = 55077642.

The previous prime is 55077619. The next prime is 55077661. The reversal of 55077643 is 34677055.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55077643 - 2¹⁷ = 54946571 is a prime.

It is not a weakly prime, because it can be changed into another prime (55077613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27538821 + 27538822.

It is an arithmetic number, because the mean of its divisors is an integer number (27538822).

Almost surely, 2^55077643 is an apocalyptic number.

55077643 is a deficient number, since it is larger than the sum of its proper divisors (1).

55077643 is an equidigital number, since it uses as much as digits as its factorization.

55077643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 88200, while the sum is 37.

The square root of 55077643 is about 7421.4313309496. The cubic root of 55077643 is about 380.4741150472.

The spelling of 55077643 in words is "fifty-five million, seventy-seven thousand, six hundred forty-three".