61218086588 has 12 divisors (see below), whose sum is σ = 107133390672. Its totient is φ = 30608546400.

The previous prime is 61218086563. The next prime is 61218086591. The reversal of 61218086588 is 88568081216.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384056 + ... + 519552.

It is an arithmetic number, because the mean of its divisors is an integer number (8927782556).

Almost surely, 2^61218086588 is an apocalyptic number.

It is an amenable number.

61218086588 is a deficient number, since it is larger than the sum of its proper divisors (45915304084).

61218086588 is a wasteful number, since it uses less digits than its factorization.

61218086588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248452 (or 248450 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 53.

The spelling of 61218086588 in words is "sixty-one billion, two hundred eighteen million, eighty-six thousand, five hundred eighty-eight".