55651660161 has 16 divisors (see below), whose sum is σ = 74743975488. Its totient is φ = 36830664000.

The previous prime is 55651660153. The next prime is 55651660171. The reversal of 55651660161 is 16106615655.

It is not a de Polignac number, because 55651660161 - 2³ = 55651660153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55651660121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 459711 + ... + 568011.

It is an arithmetic number, because the mean of its divisors is an integer number (4671498468).

Almost surely, 2^55651660161 is an apocalyptic number.

It is an amenable number.

55651660161 is a deficient number, since it is larger than the sum of its proper divisors (19092315327).

55651660161 is a wasteful number, since it uses less digits than its factorization.

55651660161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109552.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 55651660161 in words is "fifty-five billion, six hundred fifty-one million, six hundred sixty thousand, one hundred sixty-one".