55688071961 has 2 divisors, whose sum is σ = 55688071962. Its totient is φ = 55688071960.

The previous prime is 55688071939. The next prime is 55688071991. The reversal of 55688071961 is 16917088655.

55688071961 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., 38678695561 + 17009376400 = 196669^2 + 130420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55688071961 is a prime.

It is a super-2 number, since 2×55688071961² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55688071897 and 55688071906.

It is not a weakly prime, because it can be changed into another prime (55688071931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27844035980 + 27844035981.

It is an arithmetic number, because the mean of its divisors is an integer number (27844035981).

Almost surely, 2^55688071961 is an apocalyptic number.

It is an amenable number.

55688071961 is a deficient number, since it is larger than the sum of its proper divisors (1).

55688071961 is an equidigital number, since it uses as much as digits as its factorization.

55688071961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3628800, while the sum is 56.

The spelling of 55688071961 in words is "fifty-five billion, six hundred eighty-eight million, seventy-one thousand, nine hundred sixty-one".