55720197149 has 2 divisors, whose sum is σ = 55720197150. Its totient is φ = 55720197148.

The previous prime is 55720197097. The next prime is 55720197163. The reversal of 55720197149 is 94179102755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55369384249 + 350812900 = 235307^2 + 18730^2 .

It is a cyclic number.

It is not a de Polignac number, because 55720197149 - 2⁸ = 55720196893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55720197097 and 55720197106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55720197199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27860098574 + 27860098575.

It is an arithmetic number, because the mean of its divisors is an integer number (27860098575).

Almost surely, 2^55720197149 is an apocalyptic number.

It is an amenable number.

55720197149 is a deficient number, since it is larger than the sum of its proper divisors (1).

55720197149 is an equidigital number, since it uses as much as digits as its factorization.

55720197149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 793800, while the sum is 50.

The spelling of 55720197149 in words is "fifty-five billion, seven hundred twenty million, one hundred ninety-seven thousand, one hundred forty-nine".