55201978653 has 16 divisors (see below), whose sum is σ = 75714112320. Its totient is φ = 35748798336.

The previous prime is 55201978631. The next prime is 55201978661. The reversal of 55201978653 is 35687910255.

It is a happy number.

It is not a de Polignac number, because 55201978653 - 2¹⁰ = 55201977629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55201978596 and 55201978605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55201978603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 333000 + ... + 470417.

It is an arithmetic number, because the mean of its divisors is an integer number (4732132020).

Almost surely, 2^55201978653 is an apocalyptic number.

It is an amenable number.

55201978653 is a deficient number, since it is larger than the sum of its proper divisors (20512133667).

55201978653 is a wasteful number, since it uses less digits than its factorization.

55201978653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804076.

The product of its (nonzero) digits is 2268000, while the sum is 51.

The spelling of 55201978653 in words is "fifty-five billion, two hundred one million, nine hundred seventy-eight thousand, six hundred fifty-three".