654557849540 has 72 divisors (see below), whose sum is σ = 1650571759872. Its totient is φ = 217180474560.

The previous prime is 654557849507. The next prime is 654557849549. The reversal of 654557849540 is 45948755456.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is not an unprimeable number, because it can be changed into a prime (654557849549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10742462 + ... + 10803221.

It is an arithmetic number, because the mean of its divisors is an integer number (22924607776).

Almost surely, 2^654557849540 is an apocalyptic number.

It is an amenable number.

654557849540 is an abundant number, since it is smaller than the sum of its proper divisors (996013910332).

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

654557849540 is a wasteful number, since it uses less digits than its factorization.

654557849540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21545737 (or 21545728 counting only the distinct ones).

The product of its (nonzero) digits is 120960000, while the sum is 62.

The spelling of 654557849540 in words is "six hundred fifty-four billion, five hundred fifty-seven million, eight hundred forty-nine thousand, five hundred forty".