55415434515511 has 16 divisors (see below), whose sum is σ = 65518002964800. Its totient is φ = 45859496433408.

The previous prime is 55415434515439. The next prime is 55415434515523. The reversal of 55415434515511 is 11551543451455.

It is not a de Polignac number, because 55415434515511 - 2⁴³ = 46619341493303 is a prime.

It is a super-2 number, since 2×55415434515511² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55415434515611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1408011 + ... + 10621363.

It is an arithmetic number, because the mean of its divisors is an integer number (4094875185300).

Almost surely, 2^{55415434515511} is an apocalyptic number.

55415434515511 is a deficient number, since it is larger than the sum of its proper divisors (10102568449289).

55415434515511 is a wasteful number, since it uses less digits than its factorization.

55415434515511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9243018.

The product of its digits is 3000000, while the sum is 49.

Adding to 55415434515511 its reverse (11551543451455), we get a palindrome (66966977966966).

The spelling of 55415434515511 in words is "fifty-five trillion, four hundred fifteen billion, four hundred thirty-four million, five hundred fifteen thousand, five hundred eleven".