55390370563 has 16 divisors (see below), whose sum is σ = 63178569216. Its totient is φ = 48069672640.

The previous prime is 55390370551. The next prime is 55390370573. The reversal of 55390370563 is 36507309355.

It is not a de Polignac number, because 55390370563 - 2⁵ = 55390370531 is a prime.

It is a super-2 number, since 2×55390370563² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55390370573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90370 + ... + 344887.

It is an arithmetic number, because the mean of its divisors is an integer number (3948660576).

Almost surely, 2^55390370563 is an apocalyptic number.

55390370563 is a deficient number, since it is larger than the sum of its proper divisors (7788198653).

55390370563 is a wasteful number, since it uses less digits than its factorization.

55390370563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435794.

The product of its (nonzero) digits is 1275750, while the sum is 46.

The spelling of 55390370563 in words is "fifty-five billion, three hundred ninety million, three hundred seventy thousand, five hundred sixty-three".