20155340046657 has 8 divisors (see below), whose sum is σ = 26909956027584. Its totient is φ = 13418808715088.

The previous prime is 20155340046619. The next prime is 20155340046659. The reversal of 20155340046657 is 75664004355102.

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 20155340046657 - 2⁷ = 20155340046529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20155340046659) 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, 4521159738 + ... + 4521164195.

It is an arithmetic number, because the mean of its divisors is an integer number (3363744503448).

Almost surely, 2^{20155340046657} is an apocalyptic number.

It is an amenable number.

20155340046657 is a deficient number, since it is larger than the sum of its proper divisors (6754615980927).

20155340046657 is an equidigital number, since it uses as much as digits as its factorization.

20155340046657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9042324679.

The product of its (nonzero) digits is 3024000, while the sum is 48.

The spelling of 20155340046657 in words is "twenty trillion, one hundred fifty-five billion, three hundred forty million, forty-six thousand, six hundred fifty-seven".