55105550511 has 32 divisors (see below), whose sum is σ = 82375488000. Its totient is φ = 32472708480.

The previous prime is 55105550503. The next prime is 55105550519. The reversal of 55105550511 is 11505550155.

It is an interprime number because it is at equal distance from previous prime (55105550503) and next prime (55105550519).

It is not a de Polignac number, because 55105550511 - 2³ = 55105550503 is a prime.

It is a super-2 number, since 2×55105550511² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55105550519) 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, 1889065 + ... + 1918013.

It is an arithmetic number, because the mean of its divisors is an integer number (2574234000).

Almost surely, 2^55105550511 is an apocalyptic number.

55105550511 is a deficient number, since it is larger than the sum of its proper divisors (27269937489).

55105550511 is a wasteful number, since it uses less digits than its factorization.

55105550511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30559.

The product of its (nonzero) digits is 15625, while the sum is 33.

The spelling of 55105550511 in words is "fifty-five billion, one hundred five million, five hundred fifty thousand, five hundred eleven".