55837641661 has 2 divisors, whose sum is σ = 55837641662. Its totient is φ = 55837641660.

The previous prime is 55837641641. The next prime is 55837641773. The reversal of 55837641661 is 16614673855.

55837641661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48202202500 + 7635439161 = 219550^2 + 87381^2 .

It is a cyclic number.

It is not a de Polignac number, because 55837641661 - 2¹³ = 55837633469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55837641599 and 55837641608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55837641611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27918820830 + 27918820831.

It is an arithmetic number, because the mean of its divisors is an integer number (27918820831).

Almost surely, 2^55837641661 is an apocalyptic number.

It is an amenable number.

55837641661 is a deficient number, since it is larger than the sum of its proper divisors (1).

55837641661 is an equidigital number, since it uses as much as digits as its factorization.

55837641661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3628800, while the sum is 52.

The spelling of 55837641661 in words is "fifty-five billion, eight hundred thirty-seven million, six hundred forty-one thousand, six hundred sixty-one".