61663250854 has 8 divisors (see below), whose sum is σ = 92705572080. Its totient is φ = 30761393496.

The previous prime is 61663250843. The next prime is 61663250897. The reversal of 61663250854 is 45805236616.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 35114869 + ... + 35116624.

It is an arithmetic number, because the mean of its divisors is an integer number (11588196510).

Almost surely, 2^61663250854 is an apocalyptic number.

61663250854 is a deficient number, since it is larger than the sum of its proper divisors (31042321226).

61663250854 is a wasteful number, since it uses less digits than its factorization.

61663250854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70231934.

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 61663250854 in words is "sixty-one billion, six hundred sixty-three million, two hundred fifty thousand, eight hundred fifty-four".