55120551345 has 24 divisors (see below), whose sum is σ = 95572516416. Its totient is φ = 29388326688.

The previous prime is 55120551323. The next prime is 55120551349. The reversal of 55120551345 is 54315502155.

55120551345 is a `hidden beast` number, since 5 + 51 + 20 + 551 + 34 + 5 = 666.

It is not a de Polignac number, because 55120551345 - 2⁹ = 55120550833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55120551349) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48757 + ... + 335586.

It is an arithmetic number, because the mean of its divisors is an integer number (3982188184).

Almost surely, 2^55120551345 is an apocalyptic number.

It is an amenable number.

55120551345 is a deficient number, since it is larger than the sum of its proper divisors (40451965071).

55120551345 is a wasteful number, since it uses less digits than its factorization.

55120551345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387541 (or 387538 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The spelling of 55120551345 in words is "fifty-five billion, one hundred twenty million, five hundred fifty-one thousand, three hundred forty-five".