20155653655 has 4 divisors (see below), whose sum is σ = 24186784392. Its totient is φ = 16124522920.

The previous prime is 20155653647. The next prime is 20155653673. The reversal of 20155653655 is 55635655102.

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

It is not a de Polignac number, because 20155653655 - 2³ = 20155653647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2015565361 + ... + 2015565370.

It is an arithmetic number, because the mean of its divisors is an integer number (6046696098).

Almost surely, 2^20155653655 is an apocalyptic number.

20155653655 is a deficient number, since it is larger than the sum of its proper divisors (4031130737).

20155653655 is an equidigital number, since it uses as much as digits as its factorization.

20155653655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4031130736.

The product of its (nonzero) digits is 675000, while the sum is 43.

The spelling of 20155653655 in words is "twenty billion, one hundred fifty-five million, six hundred fifty-three thousand, six hundred fifty-five".