61025728618 has 8 divisors (see below), whose sum is σ = 91793576160. Its totient is φ = 30427869900.

The previous prime is 61025728609. The next prime is 61025728639. The reversal of 61025728618 is 81682752016.

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

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, 42496308 + ... + 42497743.

It is an arithmetic number, because the mean of its divisors is an integer number (11474197020).

Almost surely, 2^61025728618 is an apocalyptic number.

61025728618 is a deficient number, since it is larger than the sum of its proper divisors (30767847542).

61025728618 is a wasteful number, since it uses less digits than its factorization.

61025728618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84994412.

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 61025728618 in words is "sixty-one billion, twenty-five million, seven hundred twenty-eight thousand, six hundred eighteen".