55516861651 has 2 divisors, whose sum is σ = 55516861652. Its totient is φ = 55516861650.

The previous prime is 55516861549. The next prime is 55516861657. The reversal of 55516861651 is 15616861555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55516861651 - 2⁷ = 55516861523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55516861595 and 55516861604.

It is not a weakly prime, because it can be changed into another prime (55516861657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27758430825 + 27758430826.

It is an arithmetic number, because the mean of its divisors is an integer number (27758430826).

Almost surely, 2^55516861651 is an apocalyptic number.

55516861651 is a deficient number, since it is larger than the sum of its proper divisors (1).

55516861651 is an equidigital number, since it uses as much as digits as its factorization.

55516861651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080000, while the sum is 49.

The spelling of 55516861651 in words is "fifty-five billion, five hundred sixteen million, eight hundred sixty-one thousand, six hundred fifty-one".