20155447027061 has 8 divisors (see below), whose sum is σ = 20178350364120. Its totient is φ = 20132549077248.

The previous prime is 20155447027003. The next prime is 20155447027099. The reversal of 20155447027061 is 16072074455102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2762426823025 + 17393020204036 = 1662055^2 + 4170494^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20155447027061 - 2¹⁰ = 20155447026037 is a prime.

It is a super-3 number, since 3×20155447027061³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20155447027361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6163865 + ... + 8848961.

It is an arithmetic number, because the mean of its divisors is an integer number (2522293795515).

Almost surely, 2^{20155447027061} is an apocalyptic number.

It is an amenable number.

20155447027061 is a deficient number, since it is larger than the sum of its proper divisors (22903337059).

20155447027061 is an equidigital number, since it uses as much as digits as its factorization.

20155447027061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2693623.

The product of its (nonzero) digits is 470400, while the sum is 44.

The spelling of 20155447027061 in words is "twenty trillion, one hundred fifty-five billion, four hundred forty-seven million, twenty-seven thousand, sixty-one".