55391120124 has 12 divisors (see below), whose sum is σ = 129245946984. Its totient is φ = 18463706704.

The previous prime is 55391120123. The next prime is 55391120129. The reversal of 55391120124 is 42102119355.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55391120123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2307963327 + ... + 2307963350.

It is an arithmetic number, because the mean of its divisors is an integer number (10770495582).

Almost surely, 2^55391120124 is an apocalyptic number.

It is an amenable number.

55391120124 is an abundant number, since it is smaller than the sum of its proper divisors (73854826860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55391120124 is a wasteful number, since it uses less digits than its factorization.

55391120124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4615926684 (or 4615926682 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

Adding to 55391120124 its reverse (42102119355), we get a palindrome (97493239479).

The spelling of 55391120124 in words is "fifty-five billion, three hundred ninety-one million, one hundred twenty thousand, one hundred twenty-four".