55616721733 has 2 divisors, whose sum is σ = 55616721734. Its totient is φ = 55616721732.

The previous prime is 55616721703. The next prime is 55616721737. The reversal of 55616721733 is 33712761655.

55616721733 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28688568129 + 26928153604 = 169377^2 + 164098^2 .

It is a cyclic number.

It is not a de Polignac number, because 55616721733 - 2¹³ = 55616713541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55616721737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27808360866 + 27808360867.

It is an arithmetic number, because the mean of its divisors is an integer number (27808360867).

Almost surely, 2^55616721733 is an apocalyptic number.

It is an amenable number.

55616721733 is a deficient number, since it is larger than the sum of its proper divisors (1).

55616721733 is an equidigital number, since it uses as much as digits as its factorization.

55616721733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 793800, while the sum is 46.

The spelling of 55616721733 in words is "fifty-five billion, six hundred sixteen million, seven hundred twenty-one thousand, seven hundred thirty-three".