55113489565551 has 48 divisors (see below), whose sum is σ = 81052684352640. Its totient is φ = 36077201064000.

The previous prime is 55113489565543. The next prime is 55113489565553. The reversal of 55113489565551 is 15556598431155.

55113489565551 is a `hidden beast` number, since 5 + 5 + 1 + 1 + 3 + 489 + 56 + 55 + 51 = 666.

It is not a de Polignac number, because 55113489565551 - 2³ = 55113489565543 is a prime.

It is a super-3 number, since 3×55113489565551³ (a number of 42 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55113489565553) 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, 2816069596 + ... + 2816089166.

It is an arithmetic number, because the mean of its divisors is an integer number (1688597590680).

Almost surely, 2^{55113489565551} is an apocalyptic number.

55113489565551 is a deficient number, since it is larger than the sum of its proper divisors (25939194787089).

55113489565551 is a wasteful number, since it uses less digits than its factorization.

55113489565551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25588 (or 25585 counting only the distinct ones).

The product of its digits is 81000000, while the sum is 63.

The spelling of 55113489565551 in words is "fifty-five trillion, one hundred thirteen billion, four hundred eighty-nine million, five hundred sixty-five thousand, five hundred fifty-one".