54777761 has 2 divisors, whose sum is σ = 54777762. Its totient is φ = 54777760.

The previous prime is 54777739. The next prime is 54777773. The reversal of 54777761 is 16777745.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53567761 + 1210000 = 7319^2 + 1100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54777761 is a prime.

It is not a weakly prime, because it can be changed into another prime (54797761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27388880 + 27388881.

It is an arithmetic number, because the mean of its divisors is an integer number (27388881).

Almost surely, 2^54777761 is an apocalyptic number.

It is an amenable number.

54777761 is a deficient number, since it is larger than the sum of its proper divisors (1).

54777761 is an equidigital number, since it uses as much as digits as its factorization.

54777761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288120, while the sum is 44.

The square root of 54777761 is about 7401.1999702751. The cubic root of 54777761 is about 379.7823337921.

The spelling of 54777761 in words is "fifty-four million, seven hundred seventy-seven thousand, seven hundred sixty-one".