55220545405 has 16 divisors (see below), whose sum is σ = 69759400320. Its totient is φ = 41847081408.

The previous prime is 55220545357. The next prime is 55220545453. The reversal of 55220545405 is 50454502255.

It is an interprime number because it is at equal distance from previous prime (55220545357) and next prime (55220545453).

It is a cyclic number.

It is not a de Polignac number, because 55220545405 - 2²¹ = 55218448253 is a prime.

It is a super-2 number, since 2×55220545405² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1149039 + ... + 1196131.

It is an arithmetic number, because the mean of its divisors is an integer number (4359962520).

Almost surely, 2^55220545405 is an apocalyptic number.

It is an amenable number.

55220545405 is a deficient number, since it is larger than the sum of its proper divisors (14538854915).

55220545405 is a wasteful number, since it uses less digits than its factorization.

55220545405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59460.

The product of its (nonzero) digits is 200000, while the sum is 37.

It can be divided in two parts, 55220 and 545405, that added together give a square (600625 = 775²).

The spelling of 55220545405 in words is "fifty-five billion, two hundred twenty million, five hundred forty-five thousand, four hundred five".