654242421620 has 12 divisors (see below), whose sum is σ = 1373909085444. Its totient is φ = 261696968640.

The previous prime is 654242421589. The next prime is 654242421649. The reversal of 654242421620 is 26124242456.

654242421620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 112673006224 + 541569415396 = 335668^2 + 735914^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16356060521 + ... + 16356060560.

It is an arithmetic number, because the mean of its divisors is an integer number (114492423787).

Almost surely, 2^654242421620 is an apocalyptic number.

It is an amenable number.

654242421620 is an abundant number, since it is smaller than the sum of its proper divisors (719666663824).

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

654242421620 is a wasteful number, since it uses less digits than its factorization.

654242421620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32712121090 (or 32712121088 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 38.

The spelling of 654242421620 in words is "six hundred fifty-four billion, two hundred forty-two million, four hundred twenty-one thousand, six hundred twenty".