55517491855 has 32 divisors (see below), whose sum is σ = 81752509440. Its totient is φ = 35325104640.

The previous prime is 55517491853. The next prime is 55517491871. The reversal of 55517491855 is 55819471555.

It is not a de Polignac number, because 55517491855 - 2¹ = 55517491853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55517491796 and 55517491805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55517491853) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 614845 + ... + 699334.

It is an arithmetic number, because the mean of its divisors is an integer number (2554765920).

Almost surely, 2^55517491855 is an apocalyptic number.

55517491855 is a deficient number, since it is larger than the sum of its proper divisors (26235017585).

55517491855 is a wasteful number, since it uses less digits than its factorization.

55517491855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314279.

The product of its digits is 6300000, while the sum is 55.

The spelling of 55517491855 in words is "fifty-five billion, five hundred seventeen million, four hundred ninety-one thousand, eight hundred fifty-five".