55177346261 has 2 divisors, whose sum is σ = 55177346262. Its totient is φ = 55177346260.

The previous prime is 55177346243. The next prime is 55177346269. The reversal of 55177346261 is 16264377155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38457563236 + 16719783025 = 196106^2 + 129305^2 .

It is a cyclic number.

It is not a de Polignac number, because 55177346261 - 2⁶ = 55177346197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55177346269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27588673130 + 27588673131.

It is an arithmetic number, because the mean of its divisors is an integer number (27588673131).

Almost surely, 2^55177346261 is an apocalyptic number.

It is an amenable number.

55177346261 is a deficient number, since it is larger than the sum of its proper divisors (1).

55177346261 is an equidigital number, since it uses as much as digits as its factorization.

55177346261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1058400, while the sum is 47.

The spelling of 55177346261 in words is "fifty-five billion, one hundred seventy-seven million, three hundred forty-six thousand, two hundred sixty-one".