55391120125 has 64 divisors (see below), whose sum is σ = 78235372800. Its totient is φ = 38784480000.

The previous prime is 55391120123. The next prime is 55391120129. The reversal of 55391120125 is 52102119355.

It is a happy number.

It is not a de Polignac number, because 55391120125 - 2¹ = 55391120123 is a prime.

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 63 ways as a sum of consecutive naturals, for example, 15509590 + ... + 15513160.

It is an arithmetic number, because the mean of its divisors is an integer number (1222427700).

Almost surely, 2^55391120125 is an apocalyptic number.

55391120125 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55391120125 is a deficient number, since it is larger than the sum of its proper divisors (22844252675).

55391120125 is a wasteful number, since it uses less digits than its factorization.

55391120125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4015 (or 4005 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 34.

The spelling of 55391120125 in words is "fifty-five billion, three hundred ninety-one million, one hundred twenty thousand, one hundred twenty-five".