654624312642 has 12 divisors (see below), whose sum is σ = 1418352677430. Its totient is φ = 218208104208.

The previous prime is 654624312637. The next prime is 654624312707. The reversal of 654624312642 is 246213426456.

It is a happy number.

654624312642 is a `hidden beast` number, since 6 + 5 + 4 + 624 + 3 + 12 + 6 + 4 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 648187620201 + 6436692441 = 805101^2 + 80229^2 .

It is a super-2 number, since 2×654624312642² (a number of 24 digits) contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 18184008667 + ... + 18184008702.

Almost surely, 2^654624312642 is an apocalyptic number.

654624312642 is an abundant number, since it is smaller than the sum of its proper divisors (763728364788).

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

654624312642 is a wasteful number, since it uses less digits than its factorization.

654624312642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36368017377 (or 36368017374 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 45.

The spelling of 654624312642 in words is "six hundred fifty-four billion, six hundred twenty-four million, three hundred twelve thousand, six hundred forty-two".