20155045455 has 16 divisors (see below), whose sum is σ = 35831192160. Its totient is φ = 10749357504.

The previous prime is 20155045451. The next prime is 20155045489. The reversal of 20155045455 is 55454055102.

20155045455 is a `hidden beast` number, since 2 + 0 + 1 + 550 + 4 + 54 + 55 = 666.

It is not a de Polignac number, because 20155045455 - 2² = 20155045451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20155045451) 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, 74648182 + ... + 74648451.

It is an arithmetic number, because the mean of its divisors is an integer number (2239449510).

Almost surely, 2^20155045455 is an apocalyptic number.

20155045455 is a deficient number, since it is larger than the sum of its proper divisors (15676146705).

20155045455 is a wasteful number, since it uses less digits than its factorization.

20155045455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149296647 (or 149296641 counting only the distinct ones).

The product of its (nonzero) digits is 100000, while the sum is 36.

The spelling of 20155045455 in words is "twenty billion, one hundred fifty-five million, forty-five thousand, four hundred fifty-five".