20155653656 has 48 divisors (see below), whose sum is σ = 39762260160. Its totient is φ = 9568391040.

The previous prime is 20155653647. The next prime is 20155653673. The reversal of 20155653656 is 65635655102.

It is a super-4 number, since 4×20155653656⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 682166 + ... + 711098.

It is an arithmetic number, because the mean of its divisors is an integer number (828380420).

Almost surely, 2^20155653656 is an apocalyptic number.

It is an amenable number.

20155653656 is a deficient number, since it is larger than the sum of its proper divisors (19606606504).

20155653656 is a wasteful number, since it uses less digits than its factorization.

20155653656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29076 (or 29019 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 44.

The spelling of 20155653656 in words is "twenty billion, one hundred fifty-five million, six hundred fifty-three thousand, six hundred fifty-six".