55642160260061 has 2 divisors, whose sum is σ = 55642160260062. Its totient is φ = 55642160260060.

The previous prime is 55642160260019. The next prime is 55642160260069. The reversal of 55642160260061 is 16006206124655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37438122568900 + 18204037691161 = 6118670^2 + 4266619^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55642160260061 is a prime.

It is a super-2 number, since 2×55642160260061² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55642160259994 and 55642160260021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55642160260069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27821080130030 + 27821080130031.

It is an arithmetic number, because the mean of its divisors is an integer number (27821080130031).

Almost surely, 2^{55642160260061} is an apocalyptic number.

It is an amenable number.

55642160260061 is a deficient number, since it is larger than the sum of its proper divisors (1).

55642160260061 is an equidigital number, since it uses as much as digits as its factorization.

55642160260061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 55642160260061 in words is "fifty-five trillion, six hundred forty-two billion, one hundred sixty million, two hundred sixty thousand, sixty-one".