611653978368 has 54 divisors (see below), whose sum is σ = 1763549215974. Its totient is φ = 203884658688.

The previous prime is 611653978361. The next prime is 611653978373. The reversal of 611653978368 is 863879356116.

611653978368 is a `hidden beast` number, since 6 + 1 + 16 + 539 + 7 + 83 + 6 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 414262151424 + 197391826944 = 643632^2 + 444288^2 .

It is not an unprimeable number, because it can be changed into a prime (611653978361) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 132735105 + ... + 132739712.

Almost surely, 2^611653978368 is an apocalyptic number.

It is an amenable number.

611653978368 is an abundant number, since it is smaller than the sum of its proper divisors (1151895237606).

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

611653978368 is a wasteful number, since it uses less digits than its factorization.

611653978368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265474839 (or 265474822 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 63.

The spelling of 611653978368 in words is "six hundred eleven billion, six hundred fifty-three million, nine hundred seventy-eight thousand, three hundred sixty-eight".