55277780039 has 2 divisors, whose sum is σ = 55277780040. Its totient is φ = 55277780038.

The previous prime is 55277780009. The next prime is 55277780087. The reversal of 55277780039 is 93008777255.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55277780039 - 2⁸ = 55277779783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55277780009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27638890019 + 27638890020.

It is an arithmetic number, because the mean of its divisors is an integer number (27638890020).

Almost surely, 2^55277780039 is an apocalyptic number.

55277780039 is a deficient number, since it is larger than the sum of its proper divisors (1).

55277780039 is an equidigital number, since it uses as much as digits as its factorization.

55277780039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3704400, while the sum is 53.

The spelling of 55277780039 in words is "fifty-five billion, two hundred seventy-seven million, seven hundred eighty thousand, thirty-nine".