55431320445 has 12 divisors (see below), whose sum is σ = 96080955516. Its totient is φ = 29563370880.

The previous prime is 55431320401. The next prime is 55431320471. The reversal of 55431320445 is 54402313455.

55431320445 is a `hidden beast` number, since 554 + 31 + 32 + 0 + 4 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20287444356 + 35143876089 = 142434^2 + 187467^2 .

It is not a de Polignac number, because 55431320445 - 2²¹ = 55429223293 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 615903516 + ... + 615903605.

It is an arithmetic number, because the mean of its divisors is an integer number (8006746293).

Almost surely, 2^55431320445 is an apocalyptic number.

It is an amenable number.

55431320445 is a deficient number, since it is larger than the sum of its proper divisors (40649635071).

55431320445 is a wasteful number, since it uses less digits than its factorization.

55431320445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231807132 (or 1231807129 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

The spelling of 55431320445 in words is "fifty-five billion, four hundred thirty-one million, three hundred twenty thousand, four hundred forty-five".