2155533405603 has 16 divisors (see below), whose sum is σ = 2876095434240. Its totient is φ = 1435997199584.

The previous prime is 2155533405581. The next prime is 2155533405637. The reversal of 2155533405603 is 3065043355512.

It is a cyclic number.

It is not a de Polignac number, because 2155533405603 - 2¹⁶ = 2155533340067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2155533405703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24378688 + ... + 24466946.

It is an arithmetic number, because the mean of its divisors is an integer number (179755964640).

Almost surely, 2^{2155533405603} is an apocalyptic number.

2155533405603 is a deficient number, since it is larger than the sum of its proper divisors (720562028637).

2155533405603 is a wasteful number, since it uses less digits than its factorization.

2155533405603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93978.

The product of its (nonzero) digits is 810000, while the sum is 42.

The spelling of 2155533405603 in words is "two trillion, one hundred fifty-five billion, five hundred thirty-three million, four hundred five thousand, six hundred three".