55959621653 has 4 divisors (see below), whose sum is σ = 60264207948. Its totient is φ = 51655035360.

The previous prime is 55959621649. The next prime is 55959621673. The reversal of 55959621653 is 35612695955.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5959531204 + 50000090449 = 77198^2 + 223607^2 .

It is a cyclic number.

It is not a de Polignac number, because 55959621653 - 2² = 55959621649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55959621673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2152293128 + ... + 2152293153.

It is an arithmetic number, because the mean of its divisors is an integer number (15066051987).

Almost surely, 2^55959621653 is an apocalyptic number.

It is an amenable number.

55959621653 is a deficient number, since it is larger than the sum of its proper divisors (4304586295).

55959621653 is a wasteful number, since it uses less digits than its factorization.

55959621653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4304586294.

The product of its digits is 10935000, while the sum is 56.

The spelling of 55959621653 in words is "fifty-five billion, nine hundred fifty-nine million, six hundred twenty-one thousand, six hundred fifty-three".