55720675133 has 2 divisors, whose sum is σ = 55720675134. Its totient is φ = 55720675132.

The previous prime is 55720675117. The next prime is 55720675169. The reversal of 55720675133 is 33157602755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53655699769 + 2064975364 = 231637^2 + 45442^2 .

It is a cyclic number.

It is not a de Polignac number, because 55720675133 - 2⁴ = 55720675117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55720675183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27860337566 + 27860337567.

It is an arithmetic number, because the mean of its divisors is an integer number (27860337567).

Almost surely, 2^55720675133 is an apocalyptic number.

It is an amenable number.

55720675133 is a deficient number, since it is larger than the sum of its proper divisors (1).

55720675133 is an equidigital number, since it uses as much as digits as its factorization.

55720675133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 661500, while the sum is 44.

The spelling of 55720675133 in words is "fifty-five billion, seven hundred twenty million, six hundred seventy-five thousand, one hundred thirty-three".