55400087077 has 2 divisors, whose sum is σ = 55400087078. Its totient is φ = 55400087076.

The previous prime is 55400087063. The next prime is 55400087123. The reversal of 55400087077 is 77078000455.

55400087077 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45858509316 + 9541577761 = 214146^2 + 97681^2 .

It is a cyclic number.

It is not a de Polignac number, because 55400087077 - 2¹⁵ = 55400054309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55400087177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27700043538 + 27700043539.

It is an arithmetic number, because the mean of its divisors is an integer number (27700043539).

Almost surely, 2^55400087077 is an apocalyptic number.

It is an amenable number.

55400087077 is a deficient number, since it is larger than the sum of its proper divisors (1).

55400087077 is an equidigital number, since it uses as much as digits as its factorization.

55400087077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 274400, while the sum is 43.

The spelling of 55400087077 in words is "fifty-five billion, four hundred million, eighty-seven thousand, seventy-seven".