55123020401 has 16 divisors (see below), whose sum is σ = 56612001600. Its totient is φ = 53643824640.

The previous prime is 55123020373. The next prime is 55123020413. The reversal of 55123020401 is 10402032155.

55123020401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 55123020401 - 2¹⁰ = 55123019377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55123080401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18077525 + ... + 18080573.

It is an arithmetic number, because the mean of its divisors is an integer number (3538250100).

Almost surely, 2^55123020401 is an apocalyptic number.

It is an amenable number.

55123020401 is a deficient number, since it is larger than the sum of its proper divisors (1488981199).

55123020401 is a wasteful number, since it uses less digits than its factorization.

55123020401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4496.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 55123020401 its reverse (10402032155), we get a palindrome (65525052556).

The spelling of 55123020401 in words is "fifty-five billion, one hundred twenty-three million, twenty thousand, four hundred one".