55431594466563 has 16 divisors (see below), whose sum is σ = 86750088638720. Its totient is φ = 30819110436576.

The previous prime is 55431594466561. The next prime is 55431594466601. The reversal of 55431594466563 is 36566449513455.

It is a happy number.

It is not a de Polignac number, because 55431594466563 - 2¹ = 55431594466561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55431594466494 and 55431594466503.

It is not an unprimeable number, because it can be changed into a prime (55431594466561) 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, 35670265933 + ... + 35670267486.

It is an arithmetic number, because the mean of its divisors is an integer number (5421880539920).

Almost surely, 2^{55431594466563} is an apocalyptic number.

55431594466563 is a deficient number, since it is larger than the sum of its proper divisors (31318494172157).

55431594466563 is a wasteful number, since it uses less digits than its factorization.

55431594466563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71340533466.

The product of its digits is 699840000, while the sum is 66.

The spelling of 55431594466563 in words is "fifty-five trillion, four hundred thirty-one billion, five hundred ninety-four million, four hundred sixty-six thousand, five hundred sixty-three".