654791026890 has 512 divisors, whose sum is σ = 2196426129408. Its totient is φ = 121521945600.

The previous prime is 654791026811. The next prime is 654791026907. The reversal of 654791026890 is 98620197456.

It is a self number, because there is not a number n which added to its sum of digits gives 654791026890.

It is an unprimeable number.

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 255 ways as a sum of consecutive naturals, for example, 112639624 + ... + 112645436.

It is an arithmetic number, because the mean of its divisors is an integer number (4289894784).

Almost surely, 2^654791026890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 654791026890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1098213064704).

654791026890 is an abundant number, since it is smaller than the sum of its proper divisors (1541635102518).

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

654791026890 is a wasteful number, since it uses less digits than its factorization.

654791026890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5907 (or 5885 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 654791026890 in words is "six hundred fifty-four billion, seven hundred ninety-one million, twenty-six thousand, eight hundred ninety".