54991790564 has 6 divisors (see below), whose sum is σ = 96235633494. Its totient is φ = 27495895280.

The previous prime is 54991790563. The next prime is 54991790569. The reversal of 54991790564 is 46509719945.

It can be written as a sum of positive squares in only one way, i.e., 54588584164 + 403206400 = 233642^2 + 20080^2 .

It is not an unprimeable number, because it can be changed into a prime (54991790561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6873973817 + ... + 6873973824.

It is an arithmetic number, because the mean of its divisors is an integer number (16039272249).

Almost surely, 2^54991790564 is an apocalyptic number.

It is an amenable number.

54991790564 is a deficient number, since it is larger than the sum of its proper divisors (41243842930).

54991790564 is a wasteful number, since it uses less digits than its factorization.

54991790564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13747947645 (or 13747947643 counting only the distinct ones).

The product of its (nonzero) digits is 12247200, while the sum is 59.

The spelling of 54991790564 in words is "fifty-four billion, nine hundred ninety-one million, seven hundred ninety thousand, five hundred sixty-four".