20110601165501 has 48 divisors (see below), whose sum is σ = 25637000038272. Its totient is φ = 15599340288000.

The previous prime is 20110601165497. The next prime is 20110601165519. The reversal of 20110601165501 is 10556110601102.

It is not a de Polignac number, because 20110601165501 - 2² = 20110601165497 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110601195501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 105164165 + ... + 105355221.

It is an arithmetic number, because the mean of its divisors is an integer number (534104167464).

Almost surely, 2^{20110601165501} is an apocalyptic number.

It is an amenable number.

20110601165501 is a deficient number, since it is larger than the sum of its proper divisors (5526398872771).

20110601165501 is a wasteful number, since it uses less digits than its factorization.

20110601165501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191970 (or 191963 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 29.

Adding to 20110601165501 its reverse (10556110601102), we get a palindrome (30666711766603).

The spelling of 20110601165501 in words is "twenty trillion, one hundred ten billion, six hundred one million, one hundred sixty-five thousand, five hundred one".