54661640 has 32 divisors (see below), whose sum is σ = 134170560. Its totient is φ = 19876800.

The previous prime is 54661631. The next prime is 54661667. The reversal of 54661640 is 4616645.

It is a junction number, because it is equal to n+sod(n) for n = 54661597 and 54661606.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61676 + ... + 62555.

It is an arithmetic number, because the mean of its divisors is an integer number (4192830).

Almost surely, 2^54661640 is an apocalyptic number.

It is an amenable number.

54661640 is an abundant number, since it is smaller than the sum of its proper divisors (79508920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

54661640 is a wasteful number, since it uses less digits than its factorization.

54661640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124253 (or 124249 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 54661640 is about 7393.3510670061. The cubic root of 54661640 is about 379.5137825728.

The spelling of 54661640 in words is "fifty-four million, six hundred sixty-one thousand, six hundred forty".